Process bug fix: no pre-commit existed for this repo's Python code.
Added pyproject.toml with unified dependencies (ruff, mypy, ansible-lint),
.pre-commit-config.yaml with repo-based hooks (ruff) and local uv-run
hooks (mypy, ansible-lint).
Fixed 249 ruff errors (B023, B904, B006, B007, UP008, UP031, C408),
~13 mypy type errors, 11 ansible-lint violations, and ruff-format
across all Python files including stack-orchestrator subtree.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>