chore(deps): bump types-pyyaml from 6.0.12.20260724 to 6.0.12.20260815 - #425

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@v4, actions/setup-python@v5, astral-sh/setup-uv@v4. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

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DATABASE_URI secret is not configured — stdio integration tests were skipped. See .github/CI.md for setup instructions.