chore(release/candidate): release 1.33.0

[Jacksunwei]

🤖 I have created a release beep boop

1.33.0 (2026-05-05)

Features

• apigee: allow injecting credentials into ApigeeLlm (ce578ff)
• models: add get_function_calls and get_function_responses to LlmResponse (22fae7e)

Bug Fixes

• catch genai.ClientError when sandbox is missing (69fa777), closes #5480
• double append bug (f8b4c59)
• fix fork detection, correct offload limits, and add response logging in BigQuery plugin (9d1bb4b)
• hot reload agents for adk web (740557c)
• Mock subprocess.run in test_cli_deploy to avoid gcloud calls (92c06fe)
• prevent state_delta overwrite on function_response-only events (fc27203), closes #3178
• should use app_name instead of req.app_name (8286066)
• use asyncio.sleep to avoid blocking event loop (3a1eadc)
• Use project and location instead of API key when deploying to agent engine (398f28f)

Code Refactoring

• adjust computation of workflow.steps metric and add new unit tests (03d6208)
• remove input.type and output.type attributes from adk metrics (9559968)

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