fix: patch duplicate starter messages #5064

Job	Run time
run-core-unit-tests (test_client.py)	1m 12s
run-core-unit-tests (test_local_client.py)	1m 0s
run-core-unit-tests (test_client_legacy.py)	2m 27s
run-core-unit-tests (test_server.py)	1m 2s
run-core-unit-tests (test_managers.py)	47s
run-core-unit-tests (test_o1_agent.py)	6m 7s
run-core-unit-tests (test_tool_rule_solver.py)	44s
run-core-unit-tests (test_agent_tool_graph.py)	52s
run-core-unit-tests (test_tool_execution_sandbox.py)	1m 18s
run-core-unit-tests (test_utils.py)	51s
run-core-unit-tests (test_tool_schema_parsing.py)	2m 21s
misc-unit-tests	2m 59s
	21m 40s

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