fix(exception): NG1 fixed - 4 INTERNAL_OPTIONAL_RETURN violations migrated to Result[T]

src/session_logger.py

@@ -214,9 +214,13 @@ def log_tool_output(content: str) -> Optional[str]:
  Returns the path of the written file.
  [C: tests/test_session_logger_optimization.py:test_log_tool_output_returns_none_if_no_session, tests/test_session_logger_optimization.py:test_log_tool_output_saves_in_session_outputs]
  """
+ r = log_tool_output_result(content)
+ return r.data if r.ok else None
+
+def log_tool_output_result(content: str) -> Result[str]:
  global _output_seq
  if _session_dir is None:
-  return None
+  return Result(data=None, errors=[ErrorInfo(kind=ErrorKind.NOT_FOUND, message="No active session directory", source="session_logger.log_tool_output_result")])
 
  with _output_seq_lock:
   _output_seq += 1
@@ -227,9 +231,9 @@ def log_tool_output(content: str) -> Optional[str]:
 
  try:
   out_path.write_text(content, encoding="utf-8")
-  return str(out_path)
- except (OSError, UnicodeEncodeError):
-  return None
+  return Result(data=str(out_path))
+ except (OSError, UnicodeEncodeError) as e:
+  return Result(data=None, errors=[ErrorInfo(kind=ErrorKind.INTERNAL, message=f"Failed to write tool output: {e}", source="session_logger.log_tool_output_result", original=e)])
 
 def log_cli_call(command: str, stdin_content: Optional[str], stdout_content: Optional[str], stderr_content: Optional[str], latency: float) -> Result[bool]:
  """Log details of a CLI subprocess execution."""