fix(tests): record missing tests for test_responses_store (#3163)

# What does this PR do?

Updates test recordings.

## Test Plan

Started ollama serving the 3.2:3b model. Then ran the server:

```
LLAMA_STACK_TEST_INFERENCE_MODE=record \
  LLAMA_STACK_TEST_RECORDING_DIR=tests/integration/recordings/ \
  SQLITE_STORE_DIR=$(mktemp -d) \
  OLLAMA_URL=http://localhost:11434 \
  llama stack build --template starter --image-type venv --run
```

Then ran the tests which needed recording:

```
pytest -sv tests/integration/agents/test_openai_responses.py \
  --stack-config=server:starter \
   --text-model ollama/llama3.2:3b-instruct-fp16 -k test_responses_store
```

Then, restarted the server with `LLAMA_STACK_TEST_INFERENCE_MODE=replay`, re-ran the tests and verified they passed.

Author: ashwinb

tests/integration/recordings/index.sqlite

@@ -14,7 +14,7 @@
         "models": [
           {
             "model": "nomic-embed-text:latest",
-            "modified_at": "2025-08-05T14:04:07.946926-07:00",
+            "modified_at": "2025-08-14T20:26:10.795125-07:00",
             "digest": "0a109f422b47e3a30ba2b10eca18548e944e8a23073ee3f3e947efcf3c45e59f",
             "size": 274302450,
             "details": {