Fix migrations: commit drizzle/meta/ so journal is present in Docker build

drizzle/meta/ was gitignored, so GitHub Actions had no _journal.json to
copy into the image. The migrator requires this file to know which SQL
files to apply. Unblock by committing the meta directory.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.gitignore

@@ -44,8 +44,7 @@ playwright-report/
 test-results/
 tests/.auth/
 
-# Drizzle generated artifacts (migrations themselves are committed)
-drizzle/meta/
+# drizzle/meta/ intentionally committed — migrator requires _journal.json at runtime
 
 # Backups
 deploy/backups/data/