ci: add automatic prisma db push to deploy pipeline

Run database migration after build and before container startup
so schema changes are always applied before the app goes live.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

.gitea/workflows/deploy.yaml

@@ -126,6 +126,9 @@ jobs:
             echo "=== Building ==="
             docker compose build memento-note
 
+            echo "=== Database migration ==="
+            docker compose run --rm memento-note npx prisma db push --skip-generate
+
             echo "=== Starting ==="
             docker compose up -d --remove-orphans
             docker compose ps