Python: Add samples syntax checking with pyright (#3710)

* Add samples syntax checking with pyright

- Add pyrightconfig.samples.json with relaxed type checking but import validation
- Add samples-syntax poe task to check samples for syntax and import errors
- Add samples-syntax to check and pre-commit-check tasks
- Fix 78 sample errors:
  - Update workflow builder imports to use agent_framework_orchestrations
  - Change content type isinstance checks to content.type comparisons
  - Use Content factory methods instead of removed content type classes
  - Fix TypedDict access patterns for Annotation
  - Fix various API mismatches (normalize_messages, ChatMessage.text, role)

* fixed a bunch of samples and tweaks to pre-commit

* updated lock

* updated lock

* fixes

* added lint to samples

python/samples/concepts/response_stream.py

@@ -154,11 +154,11 @@ async def main() -> None:
         words = ["Hello", " ", "from", " ", "the", " ", "streaming", " ", "response", "!"]
         for word in words:
             await asyncio.sleep(0.05)  # Simulate network delay
-            yield ChatResponseUpdate(contents=[Content.from_text(word)], role=Role.ASSISTANT)
+            yield ChatResponseUpdate(contents=[Content.from_text(word)], role="assistant")
 
     def combine_updates(updates: Sequence[ChatResponseUpdate]) -> ChatResponse:
         """Finalizer that combines all updates into a single response."""
-        return ChatResponse.from_chat_response_updates(updates)
+        return ChatResponse.from_updates(updates)
 
     stream = ResponseStream(generate_updates(), finalizer=combine_updates)
 
@@ -237,7 +237,7 @@ async def main() -> None:
     )
 
     print("Starting iteration (cleanup happens after):")
-    async for update in stream4:
+    async for _update in stream4:
         pass  # Just consume the stream
     print(f"Cleanup was performed: {cleanup_performed['value']}")