[ENT] Versioned Migration via Atlas

[pxp928]

Description of the PR

This adds the ability to run versioned migration for ENT whenever the schema changes.

This follows the recommendation provided in: https://entgo.io/docs/versioned-migrations/#quick-guide

Checks have been added to the CI to check that the migration diff has been generated and a linter has been run via atlas.

Note: For production use cases auto migration should be disabled and atlas should be used to apply the initial migration!!

closes #1513

Example usage:

1. make changes to the schema (for example add a new optional field in artifact)
2. run make generate which will also run atlas (needs to have docker running). This will generate the migration plan in pkg/assembler/backends/ent/migrate/migrations
3. Run

atlas migrate apply \
  --dir "file://pkg/assembler/backends/ent/migrate/migrations" \
  --url "postgres://guac:guac@0.0.0.0:5432/guac?search_path=public&sslmode=disable" \

--url must be set to the running production database
--baseline specified the baseline that is currently applied to the running database (if started without atlas)

Note: A new baseline can be created from the production server by running:

atlas migrate diff my_baseline \
  --dir "file://pkg/assembler/backends/ent/migrate/migrations" \
  --dev-url "docker://postgres/15/test?search_path=public" \
  --to "postgres://guac:guac@0.0.0.0:5432/guac?search_path=public&sslmode=disable"

After successful execution, you will see the following message:

  Migrating to version 20240503144258 from 20240503123155 (1 migrations in total):

    -- migrating version 20240503144258
      -> ALTER TABLE "artifacts" ADD COLUMN "test" character varying NULL;
    -- ok (4.024333ms)

    -------------------------
    -- 12.905875ms
    -- 1 migration
    -- 1 sql statement

PR Checklist

• All commits have a Developer Certificate of Origin (DCO) -- they are generated using -s flag to git commit.
• All new changes are covered by tests
• If GraphQL schema is changed, make generate has been run
• If OpenAPI spec is changed, make generate has been run
• If collectsub protobuf has been changed, make proto has been run
• All CI checks are passing (tests and formatting)
• All dependent PRs have already been merged

[mihaimaruseac]

Thank you!

[mrizzi]

@pxp928 Thanks 👍