Fix: Add shared_session to all_litellm_params to prevent JSON serialization error

The shared_session parameter (aiohttp.ClientSession) was being passed through
to provider API calls, causing "Object of type ClientSession is not JSON
serializable" errors during embedding requests.

Added shared_session to the all_litellm_params list so it's properly filtered
out as a LiteLLM-internal parameter and not passed to the provider's API.

litellm/types/utils.py

@@ -2325,6 +2325,7 @@ all_litellm_params = [
     "litellm_session_id",
     "use_litellm_proxy",
     "prompt_label",
+    "shared_session",
 ] + list(StandardCallbackDynamicParams.__annotations__.keys())
 
 

test_embedding_session_error_debug.py

@@ -0,0 +1,42 @@
+"""
+Test script to reproduce and debug the ClientSession JSON serialization error
+"""
+import asyncio
+import aiohttp
+import litellm
+import traceback
+
+# Enable debug mode
+litellm._turn_on_debug()
+
+async def test_embedding_with_shared_session():
+    """Test that reproduces the ClientSession serialization error"""
+    
+    async with aiohttp.ClientSession() as session:
+        print(f"Created ClientSession: {session}")
+        
+        try:
+            response = await litellm.aembedding(
+                model="openai/text-embedding-ada-002",
+                input=["test input"],
+                api_key="invalid_key",
+                api_base="https://httpstat.us/500",  # This will return 500 error
+                shared_session=session  # This is the problematic parameter
+            )
+            print(f"Response: {response}")
+        except Exception as e:
+            print(f"\n❌ Error occurred: {type(e).__name__}")
+            print(f"Error message: {str(e)}")
+            print("\nFull traceback:")
+            traceback.print_exc()
+            
+            # Check if this is the ClientSession serialization error
+            if "ClientSession" in str(e) and "JSON serializable" in str(e):
+                print("\n✅ Successfully reproduced the ClientSession serialization error!")
+                return True
+    
+    return False
+
+if __name__ == "__main__":
+    asyncio.run(test_embedding_with_shared_session())
+