add cache step for mypy

[spashii]

Summary by CodeRabbit

• Chores
  • Optimized CI pipeline caching for faster build and deployment cycles.
  • Enhanced server infrastructure with improved asynchronous request handling for better performance and reliability.

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[coderabbitai]

Caution

Review failed

The pull request is closed.

Walkthrough

Adds mypy caching to the server CI job for faster build cycles, and introduces AsyncioUvicornWorker, a custom Gunicorn worker class that enforces asyncio loop mode for Uvicorn.

Changes

Cohort / File(s)	Change Summary
CI Workflow Enhancement .github/workflows/ci.yml	Adds mypy cache step to ci-check-server job with OS and dependency hash-based cache keys (echo/server/pyproject.toml, echo/server/requirements.lock) for cache invalidation. Minor formatting adjustment in build-push job.
Gunicorn Worker Implementation echo/server/dembrane/gunicorn_worker.py	New module introducing AsyncioUvicornWorker class extending UvicornWorker with CONFIG_KWARGS override setting loop to "asyncio" and http to "auto". Includes usage documentation.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

• CI cache configuration is standard actions/cache@v4 usage with straightforward key strategy
• AsyncioUvicornWorker is a thin wrapper extending existing UvicornWorker with minimal configuration override—minimal logic density

Possibly related PRs

• perf: Optimize GitHub Actions workflows for faster CI/CD #320 — Updates CI caching infrastructure with actions/cache@v4 in similar context
• Build/ci #73 — Establishes initial CI workflow configuration that this PR extends

Suggested labels

improvement

✨ Finishing touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch fix-mypy-cache-and-worker-27-nov

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📥 Commits

Reviewing files that changed from the base of the PR and between 6ba77b5 and b6e628c.

📒 Files selected for processing (2)

• .github/workflows/ci.yml (2 hunks)
• echo/server/dembrane/gunicorn_worker.py (1 hunks)

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