arun eswara edcec13372 Expose image generation usage-limit failures (#38024) ...

## What changed

- Add structured `usageLimitExceeded` metadata to failed image-generation
  items, including the image limit ID and optional reset timestamp.
- Preserve the failure metadata in completion events, app-server thread
  history, thread reads and resumes, and migrated legacy rollouts.
- Export the new failure type in the generated JSON and TypeScript schemas.

## Testing

- Cover usage-limit responses through item completion, persistence, and thread
  resume.
- Verify legacy rollout migration retains image-generation failure metadata.

GitOrigin-RevId: 91c31a2a47456b6b916ee03002ff314b05946dd4

2026-08-11 15:40:52 +00:00

..

src

Expose image generation usage-limit failures (#38024)

2026-08-11 15:40:52 +00:00

BUILD.bazel

core: support extension-owned turn items (#31283)

2026-07-08 03:55:13 +00:00

Cargo.toml

Expose structured standalone web search results (#32898)

2026-07-13 23:37:35 +00:00