fix: quote pip version specifier in ci.yml & move asyncio import to module level

[salem221094]

What broke

CI run #24933019577 failed due to two bugs introduced in the feat/mcp-server merge (PR #6).

Bug 1 — Shell interprets >= as a redirect in ci.yml

# Before (broken)
- run: pip install ruff>=0.4

# After (fixed)
- run: pip install "ruff>=0.4"

Without quotes, bash treats >= as an output redirect (>) followed by =0.4 (a filename), so the install command fails before any linting can even begin.

Bug 2 — import asyncio inside function body in mcp_server.py

# Before (broken) — import buried at bottom of serve() body
def serve() -> None:
    ...
    import asyncio          # ← ruff E402 / isort violation
    async def _run(): ...
    asyncio.run(_run())

# After (fixed) — import at module level with other stdlib imports
import asyncio
import json
import logging

Ruff's I (isort) and E402 rules require all standard-library imports to be at the top of the file. Having import asyncio inside the function body causes ruff check to fail.

Changes

• .github/workflows/ci.yml — quote the pip install "ruff>=0.4" argument
• catchme/mcp_server.py — move import asyncio to the module-level imports block