Conformance testing produces `AttributeError: 'NoneType' object has no attribute 'recordings'`

## 🔴 Required Information

**Describe the Bug:**

Conformance testing (`adk conformance test`) raises an error with a basic, newly created app.

**Steps to Reproduce:**
Run the following:

```bash
python3.14 -m venv venv
source venv/bin/activate
pip install google-adk==2.9.1
adk create example --model gemini-3.5-flash --project na --region us-central1
rm example/.env
export GOOGLE_GENAI_USE_ENTERPRISE=1
export GOOGLE_APPLICATION_CREDENTIALS="/path/to/google-credentials.json"
mkdir -p tests/core/simple_qa
cat > tests/core/simple_qa/spec.yaml <
generated-recordings.yaml

```yaml
recordings:
- user_message_index: 0
agent_name: root_agent
llm_recording:
llm_request:
model: gemini-3.5-flash
contents:
- parts:
- text: What is the timezone for Annapolis, MD?
role: user
config:
http_options:
headers:
x-goog-api-client: google-adk/2.9.1 gl-python/3.14.7
user-agent: google-adk/2.9.1 gl-python/3.14.7
system_instruction: |-
Answer user questions to the best of your knowledge

You are an agent. Your internal name is "root_agent". The description about you is "A helpful assistant for user questions.".
labels:
adk_agent_name: root_agent
live_connect_config:
input_audio_transcription: {}
output_audio_transcription: {}
llm_responses:
- model_version: gemini-3.5-flash
content:
parts:
- text: "Annapolis, Maryland is in the **Eastern Time Zone** (ET). \n\n* **Eastern Standard Time (EST):** UTC-5 (used during the autumn and winter months, from November to March)\n* **Eastern Daylight Time (EDT):** UTC-4 (used during the spring and summer months, from March to November)"
thought_signature: AY89a18D1H7owwvbYHARbqdzBHEWACGN8nRolf-qEwnR4abFfSCQpt-LHP69IM9N4q-yT43si9lNC6qYlhq57v0kw0dH_FBXAdmgWDOnsR-D5Zieg18FQxO5L1cARS2iEHjOMVKEOycrmn5r1jK_VTrWe_7vW5sdyD4RTuTGVASWcK_k0mlYbC75kke3tI-byYZHJxX2DoxDmtsbYsIcQ3M46ioQMCAbl7goJqL5GkLFuaGs2GkxYM4RadtDpSYTL94_5SCMBahmrQHg40KKE17CmHLKnk44f7fAryYXDJI4O4Yyx7HjZNTNdS-gIWHWuY_QiEkjDB6_FGBSG0_cUkDmsHU02NFxZK55HUgbkaPP1LxE2oQNDa6JTbYOFhKvCRVeWD1lycgLMi3XVhgqMHMN19X2_tvq4eDzVPJPUo3f4NhpYDcglEREE9CqP1kntOfQZljfe2DlNetyxMaMGrsf-m5AECQ2NHxdr3HYj5m4z14MC1YFfxf0dmLEcTzdaDgVrUo2KVe9-mkIJfoTpVP7s-jV45vrGn2eI-X9a-C57SJCuG4ruCEB0gFs9PT-EaRkCeXbfKFtNJGP7VvAcTsDF3m2Pa9zxymkKCxHIcmEg0i10smcEXr3Fvy-uyXxZBrykiNYNdYnGPJLQ-G65ZJyEqY8CHrHNiwMDIGpZ4_XlKrBA9rW4cklI7EjnLF-xqtWkWwahYJ35gtMOq8Q6qrF-TdRUV-e1l7UMz6Wa3T63fUPL07Ol19VuFZxw_6e13VEPC98yDHpMqMJx3Io66axlFd5ZVl-QfI1Xgb0mSJY3C6OPCOrUsZta4Lm_5zrvgmUT-hz6Mx-ZGnqGvUjPvIKXT2ONlTEc7sYgwEB1B6JY31ZJZQ19WnPU_kdC4NFFWL_tyy4DSPtRGEWWg8b_Enk1NE2JTPYrRxkGIR_biqtZcXpWkEW-RV89OtOABSNQEuzChZVPka8Y-jX2PaATzraIwLb2m4wDX5rKoq8HLKZ9e6PA0FXsEvoyIVMjM8_7Jg58BItcb-5FBkCAbYH7Tokr1AZeQ6M77r2xi6Vd8JK
role: model
finish_reason: STOP
usage_metadata:
candidates_token_count: 71
candidates_tokens_details:
- modality: TEXT
token_count: 71
prompt_token_count: 46
prompt_tokens_details:
- modality: TEXT
token_count: 46
thoughts_token_count: 185
total_token_count: 302
traffic_type: ON_DEMAND
```

generated-session.yaml

```yaml
id: b60df26d-2f64-44aa-b07f-e9d9d6a48081
app_name: example
user_id: adk_conformance_test_user
state: {}
events:
- content:
parts:
- text: What is the timezone for Annapolis, MD?
role: user
invocation_id: e-fca5ef94-8fcd-4b0d-96b1-9ee2337ee628
author: user
actions:
state_delta: {}
id: b8fee991-6044-4e33-a623-8bdd32efc242
timestamp: 1789501210.1484904
- model_version: gemini-3.5-flash
content:
parts:
- text: "Annapolis, Maryland is in the **Eastern Time Zone** (ET). \n\n* **Eastern Standard Time (EST):** UTC-5 (used during the autumn and winter months, from November to March)\n* **Eastern Daylight Time (EDT):** UTC-4 (used during the spring and summer months, from March to November)"
thought_signature: AY89a18D1H7owwvbYHARbqdzBHEWACGN8nRolf-qEwnR4abFfSCQpt-LHP69IM9N4q-yT43si9lNC6qYlhq57v0kw0dH_FBXAdmgWDOnsR-D5Zieg18FQxO5L1cARS2iEHjOMVKEOycrmn5r1jK_VTrWe_7vW5sdyD4RTuTGVASWcK_k0mlYbC75kke3tI-byYZHJxX2DoxDmtsbYsIcQ3M46ioQMCAbl7goJqL5GkLFuaGs2GkxYM4RadtDpSYTL94_5SCMBahmrQHg40KKE17CmHLKnk44f7fAryYXDJI4O4Yyx7HjZNTNdS-gIWHWuY_QiEkjDB6_FGBSG0_cUkDmsHU02NFxZK55HUgbkaPP1LxE2oQNDa6JTbYOFhKvCRVeWD1lycgLMi3XVhgqMHMN19X2_tvq4eDzVPJPUo3f4NhpYDcglEREE9CqP1kntOfQZljfe2DlNetyxMaMGrsf-m5AECQ2NHxdr3HYj5m4z14MC1YFfxf0dmLEcTzdaDgVrUo2KVe9-mkIJfoTpVP7s-jV45vrGn2eI-X9a-C57SJCuG4ruCEB0gFs9PT-EaRkCeXbfKFtNJGP7VvAcTsDF3m2Pa9zxymkKCxHIcmEg0i10smcEXr3Fvy-uyXxZBrykiNYNdYnGPJLQ-G65ZJyEqY8CHrHNiwMDIGpZ4_XlKrBA9rW4cklI7EjnLF-xqtWkWwahYJ35gtMOq8Q6qrF-TdRUV-e1l7UMz6Wa3T63fUPL07Ol19VuFZxw_6e13VEPC98yDHpMqMJx3Io66axlFd5ZVl-QfI1Xgb0mSJY3C6OPCOrUsZta4Lm_5zrvgmUT-hz6Mx-ZGnqGvUjPvIKXT2ONlTEc7sYgwEB1B6JY31ZJZQ19WnPU_kdC4NFFWL_tyy4DSPtRGEWWg8b_Enk1NE2JTPYrRxkGIR_biqtZcXpWkEW-RV89OtOABSNQEuzChZVPka8Y-jX2PaATzraIwLb2m4wDX5rKoq8HLKZ9e6PA0FXsEvoyIVMjM8_7Jg58BItcb-5FBkCAbYH7Tokr1AZeQ6M77r2xi6Vd8JK
role: model
finish_reason: STOP
usage_metadata:
candidates_token_count: 71
candidates_tokens_details:
- modality: TEXT
token_count: 71
prompt_token_count: 46
prompt_tokens_details:
- modality: TEXT
token_count: 46
thoughts_token_count: 185
total_token_count: 302
traffic_type: ON_DEMAND
invocation_id: e-fca5ef94-8fcd-4b0d-96b1-9ee2337ee628
author: root_agent
node_info:
path: root_agent@1
id: eb86c580-e504-4696-8947-ea3e4f139b8d
timestamp: 1789501210.1803176
last_update_time: 1789501210.1803176
```

**Screenshots / Video:**
N/A

**Additional Context:**
Add any other context about the problem here.

**Minimal Reproduction Code:**
See above.

**How often has this issue occurred?:**

Always