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/proxy/server.py

@@ -182,6 +182,7 @@ def _require_review_comments(value: Any) -> list[dict[str, Any]]:
         comments.append(comment)
     return comments
 
+
 def _pool_dir(cfg: Settings, repo: str) -> Path:
     _validate_repo_name(repo)
     return Path(cfg.workspace_root) / "_pool" / repo.replace("/", "__")