v0.1.0

Initial release of DataOps Observability API.\n\nIncludes:\n- FastAPI endpoints for pipeline runs, quality checks, health, and summary metrics\n- SQLAlchemy models with Alembic migration baseline\n- Pydantic schemas and environment-based settings\n- pytest API coverage, Ruff linting, and mypy type checks\n- Dockerfile, Compose file, and GitHub Actions CI