feat: [CHA-5933] add scheduled messages

[nijeesh-stream]

TLDR

Adds Chat scheduled messages to the SDK: sendMessage takes scheduled_at (the response then carries scheduled_message instead of posting to the channel), and four new chat methods manage pending ones: queryScheduledMessages, updateScheduledMessage, sendScheduledMessageNow, deleteScheduledMessage. It is a plain regeneration from the backend spec plus one integration test. Because this SDK was behind chat master, the regeneration also picks up other API changes (listed below), including a few removed moderation "intent" fields that are breaking for anyone who used them.

Risk: merge only after backend CHA-5924 is deployed. Older backends ignore scheduled_at and send the message immediately.

Ticket

• https://linear.app/stream/issue/CHA-5933

Summary

Generated from protocol release openapi-v239.72.0 (chat v239.72.0). Merge after backend CHA-5924 is deployed, because older backends ignore scheduled_at and send immediately.

The first version of this PR was generated from a local spec at chat master 39c07c8b. I regenerated it from the release: the spec built at chat v239.72.0 is byte-identical to the protocol release yaml. The regeneration changed only two doc comments, ScheduledMessageResponse.status and ScheduledMessagesFilter.status, from GetStream/chat#18730.

generate-openapi.sh ran unchanged, with ../chat checked out at tag v239.72.0. Its make openapi output is identical to the protocol release spec. Then yarn lint:gen.

Scheduled messages (CHA-5924 backend: GetStream/chat#18596, #18597, #18655, #18656)

• SendMessageRequest.scheduled_at / SendMessageResponse.scheduled_message
• ChatApi.queryScheduledMessages (POST /api/v2/chat/scheduled_messages/query). Server-side calls need user_id.
• ChatApi.updateScheduledMessage (PATCH /api/v2/chat/scheduled_messages/{id})
• ChatApi.sendScheduledMessageNow (POST /api/v2/chat/scheduled_messages/{id}/send_now)
• ChatApi.deleteScheduledMessage (DELETE /api/v2/chat/scheduled_messages/{id})
• ChannelStateResponse.scheduled_messages, plus the ScheduledMessage* models and the scheduled_message.sent / scheduled_message.failed webhook events

The feature is off by default per app; Stream enables it. The new test (__tests__/scheduled-messages.test.ts) schedules a message and then queries, updates, sends now and deletes. It skips itself when the test app returns error 114 (feature disabled) or when the backend ignores scheduled_at. So until the test app has the feature, CI shows these tests as skipped. I ran it locally against a chat master server with the feature on, and all 4 tests passed.

Unrelated changes picked up since the last release

Breaking (removed):

• IntentDetectedEvent and IntentBufferedItem are removed, along with the moderation.intent_detected member of the WHEvent union.
• CheckResponse: intent_matched_topic, intent_score, intent_score_threshold and intent_would_fire are removed, and intent_scores: IntentScoreResponse[] replaces them.
• IntentTopicRequest / IntentTopicResponse: analysis_cooldown_seconds, enabled, max_captured_items, refire_cooldown_seconds and score_threshold are removed. Intent now lives in rule-builder conditions (RuleBuilderCondition.intent_rule_params).

Tightened types (now required): ChannelMemberResponse.user_id, OwnUserResponse.blocked_user_ids.

Additive:

• Chat: ChannelApi.queryChannelBans, plus QueryChannelBans* and the ChannelBan* models
• Chat: cooldown_remaining_ms on APIError and ChannelStateResponse
• Chat: GroupedQueryChannelsRequest.sort and filter_conditions on grouped-channel groups
• Chat: AppResponseFields.defaults
• Chat: poll events (PollClosedEvent, PollUpdatedEvent, PollVote*Event, …)
• Chat: config_key/config_team on the poll write requests
• Feeds: hard_delete on deleteCollections
• Video: CallSettings*.lifecycle and ClientEvent.leave_reason/leave_initiator
• Feeds: skip_existing on add/upsert activities, async + task_id on batch follow/unfollow, include_group_counts on queryFollows, ranking_config/include_ranking_config, parent_id on notification comments, and the feeds push template event types
• Moderation: llm_model/llm_reasoning_effort on check/analyze, the delete_poll* review actions, ReviewQueueItemResponse.poll and UserChannelBanCountRuleParameters

Checklist

• yarn lint and tsc (src) pass
• New integration test, run locally against chat master
• CI green (scheduled-message tests skip on the CI test app, as expected)

🤖 Generated with Claude Code