CI: run database-backed package suites in the walking-skeleton job

The ~40 DB-gated test suites under packages/* and apps/hub/src gate on
DATABASE_URL and skip without one. build-test (the only job running
`bun run test`) has no Postgres and never sets E2E_REQUIRED, so these
suites have been skipping green on every CI run despite headers
claiming E2E_REQUIRED=1 turns a skip into a failure.

Add a step to walking-skeleton (the job with Postgres) that runs
exactly those suites with E2E_REQUIRED=1, discovering them by the same
DATABASE_URL grep signal they gate on so a newly added suite is picked
up automatically.

This is a CI-only change; there is no unit test to write.

Fixes CL-7120.

Author: TheGreatAxios

.github/workflows/ci.yml

@@ -191,3 +191,15 @@ jobs:
         run: bun test apps/hub/test
         env:
           E2E_REQUIRED: "1"
+
+      # Every DB-gated suite under packages/* and apps/hub/src gates on
+      # DATABASE_URL and describe.skip's without one, so build-test (no
+      # Postgres) never runs them. Find them by the same signal they
+      # gate on rather than hardcoding a file list, so a newly added
+      # suite gets picked up automatically. E2E_REQUIRED=1 turns a
+      # would-be skip into a hard failure.
+      - name: Run the database-backed package suites
+        run: |
+          bun test $(grep -rl DATABASE_URL --include='*.test.ts' packages apps | grep -v apps/hub/test)
+        env:
+          E2E_REQUIRED: "1"