Rename "beta" to "prototype" and document support policy

Summary:
Fixes T6084. Changes:

  - Rename `phabricator.show-beta-applications` to `phabricator.show-prototypes`, to reinforce that these include early-development applications.
  - Migrate the config setting.
  - Add an explicit "no support" banner to the config page.
  - Rename "Beta" to "Prototype" in the UI.
  - Use "bomb" icon instead of "half star" icon.
  - Document prototype applications in more detail.
  - Explicitly document that we do not support these applications.

Test Plan:
  - Ran migration.
  - Resolved "obsolete config" issue.
  - Viewed config setting.
  - Browsed prototypes in Applications app.
  - Viewed documentation.

Reviewers: chad, btrahan

Reviewed By: btrahan

Subscribers: epriestley, hach-que

Maniphest Tasks: T6084

Differential Revision: https://secure.phabricator.com/D10493
Add missing "are" to explanatory text

Summary: See D10493.

Auditors: btrahan
Fix "are are" in explanatory text

Summary: See rP8806fb0296c2.

Test Plan:
me fail english

with bonus!

Reviewers: btrahan

Reviewed By: btrahan

Subscribers: epriestley

Differential Revision: https://secure.phabricator.com/D10514
Add a UI for reviewing database schemata

Summary:
Ref T1191. Plan here is:

  - Build a tool showing the current schemata status (this diff).
  - Have it compare the current status to the desired status (partly here, mostly in future diffs).
  - Then add a migration tool, and eventually a setup issue to tell people to run it.

Test Plan:
Reviewed current schemata.

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Reviewers: btrahan

Reviewed By: btrahan

Subscribers: epriestley

Maniphest Tasks: T1191

Differential Revision: https://secure.phabricator.com/D10494
Generate expected and comparison schemata

Summary:
Ref T1191. This builds on the "view of the database as it exists" by building a view of the database as it is expected to exist (this is mostly empty for now) and comparing the two. We now render a view of the "comparison schema", which is the actual schema merged with the expected schema and annotated with the differences.

(I'm merging them like this because it makes it easier to handle both "missing" and "surpulus" warnings in a consistent way. If we tried to annotate just the actual or expected schema, the absence of components which are expected to exist is messy to handle.)

Test Plan: See screenshots.

Reviewers: btrahan

Reviewed By: btrahan

Subscribers: epriestley

Maniphest Tasks: T1191

Differential Revision: https://secure.phabricator.com/D10496
Begin generating meaningful expected schemata

Summary:
Ref T1191. This lays some groundwork for generating the expected schemata, so we can compare them to the actual schemata and produce a meaningful diff.

  - In general, each application will subclass `PhabricatorConfigSchemaSpec` and provide a definition of the tables it expects.
  - This class has helper methods to mostly-automatically build table definitions for Lisk and (in the future) edges.
  - When building expected schema, we specify a "data type", like "epoch". This is the type of data the application stores in the column, from the application's point of view. The SchemaSpec converts this into the best avilable storage type: for example, "text" will translate to `utf8mb4` if it's availalbe, or `binary` if not. This gives us a layer of indirection to insulate us from craziness.

Test Plan: See screenshots.

Reviewers: btrahan

Reviewed By: btrahan

Subscribers: epriestley

Maniphest Tasks: T1191

Differential Revision: https://secure.phabricator.com/D10497
Support key schemata and column nullability

Summary:
Ref T1191. The major issue motivation here is that InnoDB keys have a maximum length of 767 bytes. When we move `utf8` colums to `utf8mb4` columns, they'll jump from 3 bytes per character to 4 bytes per character, which may make some indexes too long. Add key schema to help spot this.

Also add nullability since it doesn't hurt.

Test Plan: See screenshots.

Reviewers: btrahan

Reviewed By: btrahan

Subscribers: epriestley

Maniphest Tasks: T1191

Differential Revision: https://secure.phabricator.com/D10499
Generate reasonable expected schemata for Audit and Auth

Summary: Ref T1191. This fills in some more features and gets audit and auth nearly generating reasonable expected schemata.

Test Plan: See screenshots.

Reviewers: btrahan

Reviewed By: btrahan

Subscribers: epriestley

Maniphest Tasks: T1191

Differential Revision: https://secure.phabricator.com/D10500
Generate reasonable expected schemata for Cache tables

Summary:
Ref T1191. Notable:

  - Rename `blob` to `bytes` for clarity.
  - Introduce raw schema specs.

Test Plan: See screenshots.

Reviewers: btrahan

Reviewed By: btrahan

Subscribers: epriestley

Maniphest Tasks: T1191

Differential Revision: https://secure.phabricator.com/D10501
Projects - add "lock membership", which prevents people from leaving

Summary:
Fixes T5603. Puts the toggling of locking membership into the editor so we get exceptions and all that.

I think the dialogue when you try to leave a project that is locked could be a little better maybe? Right now it just says "You can't leave" and "The membership is locked" more or less; should I surface a link to the policy stuff there too?

Test Plan:
 - made a project, toggled the "lock" setting, observed stickiness and good transactions being made
 - locked a project and tried to leave as a non-editor - got a dialogue letting me know i couldn't
 - locked a project and tried to leave as an editor - left successfully

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: epriestley, Korvin

Maniphest Tasks: T5603

Differential Revision: https://secure.phabricator.com/D10508
Generate reasonable expected schemata for Chatlog, Conduit, Config, Countdown, Daemons

Summary: Ref T1191. Fills in some more of the databases. Nothing very notable here. I didn't encounter any issues or overlong keys.

Test Plan: Used web UI to click around and verify expected schemata match up against actual schemata well.

Reviewers: btrahan

Reviewed By: btrahan

Subscribers: epriestley

Maniphest Tasks: T1191

Differential Revision: https://secure.phabricator.com/D10516
Generate expected schemata for Dashboards and Conpherence

Summary:
Ref T1191.

  - Add edge schemata generation.
  - Hit a couple of mostly-minor issues (T6128, T6129, T6130).

Test Plan: Viewed schema in web UI.

Reviewers: btrahan

Reviewed By: btrahan

Subscribers: epriestley

Maniphest Tasks: T1191

Differential Revision: https://secure.phabricator.com/D10518
Generate expected schemata for Doorkeeper, Draft, Drydock, Feed

Summary:
Ref T1191. Notable:

  - Allowed objects to remove default columns (some feed tables have no `id`).
  - Added a "note" severity and moved all the charset stuff down to that to make progress more clear.

Test Plan:
Trying to make the whole thing blue...

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Reviewers: btrahan

Reviewed By: btrahan

Subscribers: epriestley

Maniphest Tasks: T1191

Differential Revision: https://secure.phabricator.com/D10519
Drop old Audit tables; make markup cache binary

Summary:
Ref T1191.

  - Fixes T6096. We've migrated away from this table in T4896. The data is now in the transaction table. There have been no reads or writes to this table for some time and I haven't seen any issues from users.
  - Fixes T6097. Same deal as above. The data is now in the transaction comment table.
  - Fixes T6100. This cache is safe to wipe out, since it's purely read-through. Wiping it will make the migration faster. The column type change fixes storage of PHP serialized objects in a text column.

Test Plan:
  - Ran migrations.
  - Observed some yellow go blue on the Database Status screen.

Reviewers: btrahan

Reviewed By: btrahan

Subscribers: epriestley

Maniphest Tasks: T6096, T6100, T6097, T1191

Differential Revision: https://secure.phabricator.com/D10520
Add expected schemata for Fund, Files, Flags and Legalpad

Summary: Ref T1191. Nothing too exciting in these.

Test Plan: Saw more blue in UI.

Reviewers: btrahan

Reviewed By: btrahan

Subscribers: epriestley

Maniphest Tasks: T1191

Differential Revision: https://secure.phabricator.com/D10521
Generate expected schemata for Workers, XHProf, PHPAAST, Tokens, System, Slowvote

Summary: T1191. Nothing very notable here.

Test Plan: Saw more blue in web UI.

Reviewers: btrahan

Reviewed By: btrahan

Subscribers: epriestley

Differential Revision: https://secure.phabricator.com/D10522
Remove SlowvoteComment and storage

Summary: Ref T1191. This was migrated to transactions a very long time ago.

Test Plan: Ran migration, grepped, left comments in Slowvote.

Reviewers: btrahan

Reviewed By: btrahan

Subscribers: epriestley

Maniphest Tasks: T1191

Differential Revision: https://secure.phabricator.com/D10523
Generate expected schemata for Calendar

Summary:
Ref T1191.

  - There was a varchar(50) column. I changed it to `text64`, since this length is unusual.
  - There was an int(3) column. I changed it to `int32`, since this length is unusual.

Test Plan: Ran migrations, saw warnings disappear from config tool.

Reviewers: btrahan

Reviewed By: btrahan

Subscribers: epriestley

Maniphest Tasks: T1191

Differential Revision: https://secure.phabricator.com/D10524
Load all keys, support unique keys, and provide an "all issues" view

Summary:
Ref T1191. Three parts:

  - The old way of getting key information only got primary / unique / foreign keys, not all keys. Use `SHOW INDEXES` to get all keys instead.
  - Track key uniqueness and raise warnings about it.
  - Add a new "all issues" view to show an expanded, flat view of all issues. This is just an easier way to get a list so you don't have to dig around in the hierarchical view.

Test Plan:
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Reviewers: btrahan

Reviewed By: btrahan

Subscribers: epriestley

Maniphest Tasks: T1191

Differential Revision: https://secure.phabricator.com/D10525
Generate expected schemata for Maniphest

Summary:
Ref T1191.

  - Adds support for custom fields.
  - Adds support for partial indexes (indexes on a prefix of a column).
  - Drops old auxiliary storage table: this was moved to custom field storage about a year ago.
  - Drops old project table: this was moved to edges about two months ago.

Test Plan:
  - Viewed web UI, saw fewer issues.
  - Used `grep` to verify no readers/writers for storage or project table.

Reviewers: btrahan

Reviewed By: btrahan

Subscribers: epriestley

Maniphest Tasks: T1191

Differential Revision: https://secure.phabricator.com/D10526