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, so ruff never installs and the lint job fails immediately.

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

# Before (broken)
def serve() -> None:
    ...
    import asyncio   # ← ruff I001/E402 violation
    asyncio.run(_run())

# After (fixed)
import asyncio
import json
import logging

Ruff's isort (I) rules require all stdlib imports at the top of the file.

Changes

• .github/workflows/ci.yml — 1 line: quote the pip install argument
• catchme/mcp_server.py — 1 line: move import asyncio to module-level