Fix: Add conditional import for Self type to support Python 3.10

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

tests/compatibility/test_python310_compatibility.py

@@ -0,0 +1,14 @@
+def test_self_import_compatibility():
+    """
+    Test that the Self type is properly imported and used
+    in a way that supports Python 3.10+.
+    
+    This test will pass as long as the module imports successfully.
+    The actual failure would happen during import if the compatibility
+    fix is not working.
+    """
+    try:
+        from crewai.memory.memory import Self
+        assert True, "Self type imported successfully"
+    except ImportError:
+        assert False, "Failed to import Self type from crewai.memory.memory"