<!-- The PR description should answer 2 important questions: -->
### What
<!-- What is this PR trying to accomplish (and why, if it's not
obvious)? -->
<!-- Consider: do we need to add a changelog entry? -->
<!-- Does this PR introduce new validation that might break old builds?
-->
<!-- Consider: do we need to put new checks behind a flag? -->
Enable generating GraphQL schema for subscriptions. The execution of the
subscriptions yet to be implemented.
V3_GIT_ORIGIN_REV_ID: 2380423c39bdafbff0fc4011c0bc461e2fb0da14
<!-- The PR description should answer 2 important questions: -->
### What
Updating the various Postgres test schemas we use in execute tests is
quite hard, and most of them have been hand modified to match certain
tests.
This meant you could not update the Postgres test SQL and propagate the
schema changes in all tests, which is frustrating.
But now we can!
### How
- Modifies the script that updates all `custom_connector` schemas to
make it work for Postgres too
- Runs it, updating all `DataConnectorLink` for `ndc-postgres` to match
the output of `/schema` from `ndc-postgres`
- Fixes lots of tests, that were all using slightly hand modified
`ndc-postgres` schema output. Mostly this involves swapping `String` and
`varchar` for `text`, and `Int` for `int4`.
V3_GIT_ORIGIN_REV_ID: d695c48d1ae04d51a17bf54786782830ddb1d683
<!-- The PR description should answer 2 important questions: -->
### What
We want to use `CompatibilityConfig` to configure turning warnings into
errors after a certain date, and to make sure we don't break old builds.
This allows passing a path to a optional compatibility config file to
engine and scaffolds how we'll map this config to metadata resolve
options.
### How
Add a flag to `v3-engine`, parse the file if flag is set. Test it by
adding static test file and using it with `just watch` and `just run`.
V3_GIT_ORIGIN_REV_ID: 972c67ae29905b9ce1bb57e150f4cfcfd6a069ef
### What
- Added `AuthConfig` v2 config example in
`static/auth/auth_config_v2.json`
- Moved exisiting `auth_config.json` to `static/auth/`
- Removed unused `pre_plugins.json`
If one wants to start the engine with a v2 of AuthConfig,
`static/auth/auth_config_v2.json` can be used.
V3_GIT_ORIGIN_REV_ID: 471f8ae43ab02c2182457804a24b8445bb41f06c
