feat: return relevance score for chunk based search (alpha only)
feat: support writing user events for blended engines
feat: support cancelling import operations
feat: add custom model list API
docs: keep the API doc up-to-date with recent changes
PiperOrigin-RevId: 638008355
feat: add standalone grounding API
feat: add project provision and terms APIs
fix!: remove some unused LRO metadata/response
docs: keep the API doc up-to-date with recent changes
PiperOrigin-RevId: 624207111