docs: A comment for field `filter` in message `.google.cloud.discoveryengine.v1.ListSessionsRequest` is changed
docs: A comment for field `session` in message `.google.cloud.discoveryengine.v1.SearchRequest` is changed
docs: A comment for field `query` in message `.google.cloud.discoveryengine.v1.Session` is changed
docs: A comment for field `answer` in message `.google.cloud.discoveryengine.v1.Session` is changed
docs: A comment for field `query_id` in message `.google.cloud.discoveryengine.v1.Query` is changed
PiperOrigin-RevId: 786299564
feat: support query rephraser model for answer API
feat: support end user spec for answer API
feat: support grounding and safety rating for answer API
feat: support relevance threshold in search
feat: support boosting for blended search
feat: support auto mode in search as your type
feat: support model scores in search
feat: support search highlighting
feat: support enterprise web retrieval source for grounding
feat: support images in web search grounding
feat: add sitemap APIs
feat: add interpolation boost action and promotion action
feat: allow FHIR import to use latest predefined schema
feat: allow unstructured data import to force refresh all content
feat: support conversion user event
feat: support panel aware user event
docs: keep the API doc up-to-date with recent changes
PiperOrigin-RevId: 740152749
feat: promote answer APIs to v1 GA
feat: promote ranking APIs to v1 GA
feat: add control service APIs
feat: support writing user events for blended engines
feat: support cancelling import operations
docs: keep the API doc up-to-date with recent changes
PiperOrigin-RevId: 637140936
