feat(python): implemented host tool event normalization and error checks

- Added `_normalize_host_tool_event` to `RpcClient` to remap transport tool events to executed host tools.
- Updated worker tool-end handling to verify `is_error` is false before marking terminal actions complete.
- Added test coverage in `test_client.py` and `test_worker.py` for host tool event normalization and errored review submission behavior.

python/robomp/tests/test_github_events.py

@@ -975,5 +975,3 @@ def test_route_non_directive_comment_carries_no_pragmas() -> None:
     )
     assert decision.directive is False
     assert decision.directive_pragmas == ()
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-