test(auth): add _build_google_auth() unit tests and bump to v1.1.1

- 4 tests covering unconfigured/configured/no-jwt-key/stdio-warning paths
- Validates GoogleProvider is called with correct kwargs
- Verifies jwt_signing_key is omitted (not passed empty) when unset

Co-authored-by: Claude <noreply@anthropic.com>

uv.lock

@@ -1572,7 +1572,7 @@ wheels = [
 
 [[package]]
 name = "unraid-mcp"
-version = "1.0.1"
+version = "1.1.1"
 source = { editable = "." }
 dependencies = [
     { name = "fastapi" },