feat: Add performance monitoring and type safety improvements

- Add performance monitoring for serialization
- Add type safety protocols
- Add concurrent access test
- Improve error handling
- Optimize thread-safe primitive detection

Co-Authored-By: Joe Moura <joao@crewai.com>

tests/test_flow_thread_locks.py

@@ -157,3 +157,26 @@ def test_flow_with_async_locks():
     result = asyncio.run(flow.kickoff_async())
     assert result == "step 1 -> step 2"
     assert flow.state.value == "step 1 -> step 2"
+
+
+def test_flow_concurrent_access():
+    """Test Flow with concurrent access."""
+    flow = LockFlow()
+    results = []
+    errors = []
+    
+    async def run_flow():
+        try:
+            result = await flow.kickoff_async()
+            results.append(result)
+        except Exception as e:
+            errors.append(e)
+    
+    async def test():
+        tasks = [run_flow() for _ in range(10)]
+        await asyncio.gather(*tasks)
+    
+    asyncio.run(test())
+    assert len(results) == 10
+    assert not errors
+    assert all(result == "step 1 -> step 2" for result in results)