[CHA-1578] refactor: code generated from openapi specs

[mogita]

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Description of the pull request

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Note

Medium Risk
Medium risk due to potentially breaking SDK surface changes (renamed methods and changed response types) plus broad new integration coverage and increased test parallelism/timeouts that may surface CI flakiness or rate-limit issues.

Overview
Updates generated SDK code to match latest OpenAPI specs, including a bug fix passing callType/callID to Call.GetCallParticipantSessionMetrics and several Chat API signature adjustments (e.g., ScheduleCampaign renamed to StopCampaign, and message action/commit/translate/undelete now return more specific response types).

Adds new API capabilities: Chat.QueryTeamUsageStats, a full set of user group endpoints on the root Client (List/Create/Search/Get/Update/Delete + member add/remove), and new Feeds endpoints for UpdateActivitiesPartialBatch, QueryPinnedActivities, and RestoreFeedGroup; also removes the generated Chat.ChannelBatchUpdate.

Expands coverage substantially with new Chat-focused integration tests (channels, messages, polls, reactions, users, user groups, webhooks, misc), adds an HTTP 429-retrying test client, and tweaks CI/dev workflow: pre-commit lint hook + make setup-hooks, and CI go test now runs with higher parallelism and a longer timeout.

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[Copilot]

Pull request overview

This PR represents a comprehensive refactoring of the GetStream SDK, with code regenerated from refactored OpenAPI specifications. The changes primarily focus on improving type consistency, documentation, and API design across the feeds, chat, and video domains.

Key Changes

• Type System Refactoring: Separation of request/response types with consistent naming patterns (e.g., *Request, *Response, *Payload suffixes)
• Model Consolidation: Removal of duplicate or deprecated types (e.g., Channel, Message, User, Poll, Ban replaced with dedicated response types)
• API Method Updates: Renamed batch operations methods (OwnCapabilitiesBatch → OwnBatch) and added new delete operations
• Enhanced Documentation: Added comprehensive comments to events, request types, and response types

Reviewed changes

Copilot reviewed 8 out of 9 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
requests.go	Renamed request types with consistent *Request and *Payload suffixes; added new fields and types for batch operations
models.go	Major refactoring: removed ~30 deprecated types, added ~50 new response types, enhanced event documentation, separated feeds/chat reaction types
feeds.go	Minor change with an unprofessional comment that needs removal
feeds-v3.go	Renamed OwnCapabilitiesBatch to OwnBatch, added DeleteFeedsBatch, updated DeleteFeedUserData endpoint from DELETE to POST
feeds_test.go	Updated tests to match renamed methods and added new test for DeleteFeedsBatch
common_test.go	Removed test skip statements for upload tests
chat_test.go	Removed test skip statements for upload tests
chat.go	Minor documentation update (duplicate event comment)
call.go	Reformatted imports to use grouped style

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