Use mcp tools for filter chain (#621)

* agents framework demo

* more changes

* add more changes

* pending changes

* fix tests

* fix more

* rebase with main and better handle error from mcp

* add trace for filters

* add test for client error, server error and for mcp error

* update schema validate code and rename kind => type in agent_filter

* fix agent description and pre-commit

* fix tests

* add provider specific request parsing in agents chat

* fix precommit and tests

* cleanup demo

* update readme

* fix pre-commit

* refactor tracing

* fix fmt

* fix: handle MessageContent enum in responses API conversion

- Update request.rs to handle new MessageContent enum structure from main
- MessageContent can now be Text(String) or Items(Vec<InputContent>)
- Handle new InputItem variants (ItemReference, FunctionCallOutput)
- Fixes compilation error after merging latest main (#632)

* address pr feedback

* fix span

* fix build

* update openai version

arch/tools/cli/utils.py

@@ -57,6 +57,10 @@ def convert_legacy_listeners(
         "timeout": "30s",
     }
 
+    # Handle None case
+    if listeners is None:
+        return [llm_gateway_listener], llm_gateway_listener, prompt_gateway_listener
+
     if isinstance(listeners, dict):
         # legacy listeners
         # check if type is array or object