fix: sync fixture for alembic stamp, E2E CI race fix, ruff I rule removal

- Rewrite setup_database fixture to use sync engine with alembic stamp
- Fix E2E CI race condition (test-e2e depends on test-integration)
- Remove ruff I rule to resolve isort conflict

.woodpecker/pipeline.yml

@@ -104,7 +104,7 @@ steps:
       UV_PYTHON: "3.13"
       DB_URL: postgresql+asyncpg://postgres:postgres@postgres:5432/blog_test
       SKIP_INIT_DB: "1"
-    depends_on: [deps]
+    depends_on: [test-integration]
     commands:
       - pip install uv
       - uv run --no-sync alembic upgrade head