fix: set both text and contents on Message, restore copyright header

- Set both text= and contents= when constructing Message in
  InputObserverMiddleware for compatibility with downstream code
- Restore missing copyright header in azure_openai_response_retry.py

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: 2 people

src/processor/src/libs/agent_framework/azure_openai_response_retry.py

@@ -1,3 +1,4 @@
+# Copyright (c) Microsoft Corporation.
 # Licensed under the MIT License.
 
 """Azure OpenAI Responses client wrapper with rate-limit-aware retry logic."""

src/processor/src/libs/agent_framework/middlewares.py

@@ -159,7 +159,7 @@ async def process(
                         f"[InputObserverMiddleware] Updated: '{original_text}' -> '{updated_text}'"
                     )
 
-                modified_message = Message(role=message.role, contents=updated_text)
+                modified_message = Message(role=message.role, text=updated_text, contents=updated_text)
                 modified_messages.append(modified_message)
                 modified_count += 1
             else: