feat(python/robomp): added the wontfix primary classification and comment-only triage path

- Added `wontfix` to primary classification handling by updating host-tool classification metadata and issue taxonomy prompts.
- Updated kickoff/follow-up/system prompt guidance to treat intentional-design reports as `wontfix`, with maintainer-intent signals stopping work and ending in a single explanatory comment.
- Added tests to verify `classify_issue` persists a `wontfix` classification and returns a no-PR, comment-only next step.

python/robomp/src/worker.py

@@ -697,9 +697,7 @@ def _run_rpc_blocking(
                 stop_reason = turn.assistant_message.get("stopReason")
                 if stop_reason == "error":
                     error_msg = turn.assistant_message.get("errorMessage") or "model returned error"
-                    raise RuntimeError(
-                        f"omp agent error (stopReason=error): {error_msg}"
-                    )
+                    raise RuntimeError(f"omp agent error (stopReason=error): {error_msg}")
             log.info(
                 "rpc_done",
                 extra={