fix: Add type annotation to fix mypy errors in health_check

Add explicit dict[str, dict[str, Any]] annotation to checks_run variable
to allow mixed value types (bool and str) in check result dictionaries.

Fixes mypy type errors for v3.7.0 release validation.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <[email protected]>

Author: 2 people

src/empathy_os/workflows/health_check.py

@@ -209,7 +209,7 @@ async def _basic_health_check(self, path: str) -> dict:
         import subprocess
 
         issues = []
-        checks_run = {}
+        checks_run: dict[str, dict[str, Any]] = {}
         health_score = 100.0
 
         # Lint check