feat: refactor agent memory representation and modify routes for editing blocks #5006

Job	Run time
run-core-unit-tests (test_client.py)	2m 33s
run-core-unit-tests (test_local_client.py)	1m 21s
run-core-unit-tests (test_client_legacy.py)	4m 11s
run-core-unit-tests (test_server.py)	1m 1s
run-core-unit-tests (test_managers.py)	1m 3s
run-core-unit-tests (test_o1_agent.py)	1m 12s
run-core-unit-tests (test_tool_rule_solver.py)	47s
run-core-unit-tests (test_agent_tool_graph.py)	1m 6s
run-core-unit-tests (test_tool_execution_sandbox.py)	1m 44s
run-core-unit-tests (test_utils.py)	52s
misc-unit-tests	0s
	15m 50s

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