1.15.21

## What's Changed

### Features
- Add telemetry to track checkpoint runtime and CLI usage.

### Bug Fixes
- Fix gateway errors reported inside an HTTP 200 response.
- Keep deploy push on the AMP create source.
- Report scrape failures instead of raising IndexError in the Oxylabs integration.
- Route all DashScope models through the native provider.
- Persist JSON checkpoints as UTF-8.
- Drop stray $ in f-string search URLs for BrightData.
- Support list-form type arrays in JSON schema conversion.
- Correct gpt-4o-mini context window from 200000 to 128000.
- Preserve streaming tool call arguments at contentBlockStop.
- Make pre-commit hooks portable on Windows.

### Documentation
- Clarify that tracing is managed separately from telemetry.
- Fix parallel search reference link.
- Remove stale parameters from handle_llm_stream_chunk docstring.
- Fix streaming output docstring examples.
- Use organization UUIDs in the skill install reference.

## Contributors

@Alphaxiaoteng, @DrewWhittleNZ, @Ghraven, @Shxiao101, @Vaishnavi220506, @Vidit-Ostwal, @danielfsbarreto, @georgeatparallel, @github-actions[bot], @jessemiller, @joaomdmoura, @kimnamu, @kiwoongyoon, @liang0417, @lorenzejay, @oxy-giedrius, @simpleqt, @uoparaji