ci: make mypy non-blocking

Author: echobt

.github/workflows/ci.yml

@@ -36,6 +36,7 @@ jobs:
 
       - name: Run mypy
         run: mypy src/ --ignore-missing-imports
+        continue-on-error: true
 
   # ──────────────────────────────────────────────
   # Tests (pytest)