Update hosted agent samples to support Python 3.14 and fix response handling (#47549)

Author: howieleung

sdk/ai/azure-ai-projects/CHANGELOG.md

@@ -18,6 +18,8 @@ Breaking changes in beta methods:
 * Updated `sample_dataset_generation_job_traces_for_evaluation.py` and `sample_dataset_generation_job_traces_for_finetuning.py` to create a temporary agent, seed conversations, retry the data generation job over the trace window, and clean up all created resources.
 * Updated `sample_memory_crud.py` and `sample_memory_crud_async.py` to demonstrate memory item CRUD (`create_memory`, `get_memory`, `update_memory`, `list_memories`, `delete_memory`) in addition to memory store CRUD.
 * Updated the rubric evaluator generation samples (`sample_rubric_evaluator_generation_basic.py`, `sample_rubric_evaluator_generation_iterate.py`, `sample_rubric_evaluator_generation_lifecycle.py`, `sample_rubric_evaluator_generation_all_sources.py`) to use the typed `EvaluatorGenerationJob` / `EvaluatorGenerationInputs` / `*EvaluatorGenerationJobSource` models. The job inputs are now nested under `inputs` per the service contract, and the traces source uses `datetime` values for `start_time` / `end_time`.
+* Updated Hosted Agent code-upload samples (`sample_create_hosted_agent_from_code.py`, `sample_create_hosted_agent_from_code_async.py`) to target runtime `python_3_14`, since `python_3_12` is no longer supported.
+* Updated Hosted Agent echo-agent assets (`samples/hosted_agents/assets/echo-agent/main.py`, `echo-agent.zip`, `echo-agent-prebuilt.zip`) to use `@app.response_handler`, resolving a response-handling issue.
 
 ## 2.2.0 (2026-05-29)
 

sdk/ai/azure-ai-projects/samples/hosted_agents/assets/echo-agent-prebuilt.zip

@@ -21,7 +21,7 @@
 # app = ResponsesAgentServerHost()
 
 
-# @app.create_handler
+# @app.response_handler
 # async def handler(request: CreateResponse, context: ResponseContext, cancellation_signal: asyncio.Event):
 #     """Echo the user's input back as a single message."""
 #     input_text = await context.get_input_text()

sdk/ai/azure-ai-projects/samples/hosted_agents/assets/echo-agent.zip

@@ -80,7 +80,7 @@
                 cpu="0.5",
                 memory="1Gi",
                 code_configuration=CodeConfiguration(
-                    runtime="python_3_12",
+                    runtime="python_3_14",
                     entry_point=["python", "main.py"],
                     dependency_resolution=dependency_resolution,
                 ),

sdk/ai/azure-ai-projects/samples/hosted_agents/assets/echo-agent/main.py

@@ -84,7 +84,7 @@ async def main() -> None:
                     cpu="0.5",
                     memory="1Gi",
                     code_configuration=CodeConfiguration(
-                        runtime="python_3_12",
+                        runtime="python_3_14",
                         entry_point=["python", "main.py"],
                         dependency_resolution=dependency_resolution,
                     ),