CM-71014: log the OSError when a read path cannot be stat-ed

The stat guard swallowed OSError silently, so a file read that was skipped because
its path could not be reached looked identical to one skipped for being a
directory. Log it at debug with the path.

Reachable on the older interpreters in the support matrix: Path.is_file() raises
PermissionError on 3.9 and 3.11 (verified), while on 3.13+ it delegates to
os.path.isfile and swallows the error itself. requires-python is >=3.9 and the
Docker image and release builds run 3.9, so the branch is live for those installs
and inert for the bundled executable.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

Author: Ilanlido

cycode/cli/apps/ai_guardrails/ides/copilot.py

@@ -326,7 +326,8 @@ def _read_file_path(tool_name: str, tool_input: object) -> Optional[str]:
     try:
         if not Path(raw_path).is_file():
             return None
-    except OSError:
+    except OSError as e:
+        logger.debug('Failed to stat read path, %s', {'path': raw_path}, exc_info=e)
         return None
     return raw_path