OpenAPI specs v239.72.0

OpenAPI specs from chat release v239.72.0.

• [FEEDS-1824] Add QueryFollows include_group_counts (PR: #18676, Author: @itsmeadi)
• [CHA-6099] Drop app_pk=0 rows from health rollup facts (PR: #18675, Author: @hifaizsk)
• [FEEDS-1938] Support feeds events in check_push (PR: #18689, Author: @hifaizsk)
• [INF-2127] Scale in asia-southeast1 c1 (11→9) and europe-west2 c1 (3→2) Valkey shards (PR: #18487, Author: @razkevich)
• [CHA-6073] Run europe-west4 c1 chat and chat-manager on v239.70.0 (PR: #18715, Author: @shaljam)
• [vid-0] update sfu version to v1.178.1 (PR: #18717, Author: @vagruchi)
• [FEEDS-2078] Mirror processor interest tags to the TiKV summary (PR: #18707, Author: @naumoskajana)
• [INF-2296] Reject zero ticket numbers in PR titles (PR: #18719, Author: @razkevich)
• [CHA-5924] Edit, delete and send now scheduled messages (PR: #18597, Author: @nijeesh-stream)
• [CHA-5924] Query scheduled messages (PR: #18655, Author: @nijeesh-stream)
• [CHA-5924] Include scheduled messages in GetOrCreateChannel (PR: #18656, Author: @nijeesh-stream)
• [CHA-5924] Accept pending: false with scheduled_at (PR: #18727, Author: @nijeesh-stream)
• [CHA-6087] Scrub Gumtree UK meta_data in scheduled message payloads (PR: #18670, Author: @nijeesh-stream)
• [CHA-6114] Reject null sort entries in query endpoints (PR: #18728, Author: @nijeesh-stream)
• [CHA-5939] Scheduled messages backend doc (PR: #18671, Author: @nijeesh-stream)
• [CHA-5926] Add scheduled messages sweep and per-app send pacer (PR: #18725, Author: @nijeesh-stream)
• [CHA-6113] Report sending for scheduled messages awaiting a retry (PR: #18730, Author: @nijeesh-stream)
• [CHA-6115] Return mentioned users in scheduled send responses (PR: #18731, Author: @nijeesh-stream)
• [CHA-5930] Add scheduled messages alerts and runbooks (PR: #18732, Author: @nijeesh-stream)
• [CHA-5931] Add scheduled messages QA and failure-mode tests (PR: #18729, Author: @nijeesh-stream)
• [CHA-6119] Port monolith/importer from go-pg to bun (PR: #18710, Author: @adityaalifn)
• [CHA-5925] Fail scheduled messages that keep crashing the send (PR: #18736, Author: @nijeesh-stream)
• [INF-2141] Relocate skill: copy lessons from the Patreon drain (PR: #18718, Author: @razkevich)
• [CHA-6115] Reject unknown mentioned users when scheduling a message (PR: #18735, Author: @nijeesh-stream)
• [CHA-5931] Add scheduled messages sweep end-to-end tests (PR: #18741, Author: @nijeesh-stream)
• Release v239.72.0 (PR: #18743, Author: @stream-ci-bot)