Add PostgreSQL initializers and runtimes in nginx.conf.

[#60019012]
[WIP] Add scheleton of PostgreSql adapter.

[#60019012]
Use shallow copy instead of deepcopy in mysql detached adapter.
Use PosgreSql adapter's location and execute location methods.

[#60019012]
Complete PostgreSQL adapter.

[#60019012]
Add PostgreSql detached adapter.

[#60019012]
Add PostgreSql ORM.
Make PostgreSql adapter and ORM work.

[Finishes #60019012]
Fix launcher tests.
Fixl database migration errors.