Setting the primary key TYPE in stories to bigint to match production db.

I'M NOT CREATING A MIGRATION BECAUSE THE CHANGE IS ALREADY IN PRODUCTION THE PRODUCTION DB AND ALTERING THE
STORIES TABLE WOULD TAKE A VERY LONGTIME. ALSO GENERATING A MIGRATION WOULD BE TIME CONSUMING DUE TO
DEPENDENT OBJECTS AND VIEWS.
Purge old  delta_query and parent_delta_query directives.
Switch from deprecated CachedSqlEntityProcessor to SqlEntityProcessor with SortedMapBackupCache
Revert "Setting the primary key TYPE in stories to bigint to match production db."

I realized that the type of stories_id in the production db was actually int instead of bigint so reverting.

This reverts commit f5f35d87ddc7854262b66dd6b72d53888c940974.
CAST from bigint to int to enable import of processed_stories.
Change the type of processed_stories.stories_id from bigint to int to match stories.stories_id
Get rid of CAST since the type of processed_stories.stories_id is now int.
Merge branch 'master' of github.com:berkmancenter/mediacloud
Add processed_stories_id to the schema.
sql updates for health pages
merge sql migrations
media source health tracking
add encoding during story checksum to prevent error
fix provider only to generate downloads for active feeds
set default title as (no title)
limit url and guid to 1024 characters
add new downloads and stories indexes
add stories and downloads indexes
add more verbose error for is_new query to debug 'cannot bind reference' error
typo bug