OpenAPI specs v239.7.0

OpenAPI specs from chat release v239.7.0.

• [FEEDS-1873] Feeds retention policy backup+restore (PR: #16711, Author: @naumoskajana)
• [CHA-0] us-east4 c18: bump non-ws binaries to v239.6.0 (PR: #17307, Author: @vishalnarkhede)
• [FEEDS-1927] Make detached-load cache tests deterministic (PR: #17306, Author: @JimmyPettersson85)
• [VID-1490] Re-tier the SFU TLS certificate alert: Slack at 14 days, page at 3 (PR: #17220, Author: @pojala)
• [INF-1978] Pin KubeBlocks fork to 1.0.2-getstream.5 (PR: #17308, Author: @mogita)
• [CHA-5441] Split monolith/errors into core and product packages (PR: #17263, Author: @Acconut)
• [CHA-5305] Bump us-east4 c4 and c8 to v239.6.0 (PR: #17311, Author: @shaljam)
• [VID-1382] Review individual recording usage (PR: #16740, Author: @RaphReynaud)
• [VID-1467] OCI SFU Datadog monitors: drop dead/noisy monitors, fix NACK gate evaluation, traffic-based fleet_down (PR: #17000, Author: @pojala)
• [VID-1408] Nightly video daily-digest cron for us-east5:c3 (PR: #17138, Author: @pojala)
• [FEEDS-1595] Expose aggregation group_size on the Feeds API (PR: #17300, Author: @itsmeadi)
• [INF-1521] Add video CDN e2e check script and skill (PR: #17314, Author: @razkevich)
• [CHA-5558] Deploy v239.6.0 to us-east4:c5 and c7 (PR: #17309, Author: @adityaalifn)
• [INF-2107] Bring up the europe-west4 CDN stack and ramp c1 + c2 to 100% (PR: #17310, Author: @guruwinderrishi)
• [CHA-0] allow control plane regions without edge proxies (PR: #17320, Author: @bokan)
• [MOD2-1320] Add keyword full-text filter to moderation labels/results (PR: #16578, Author: @jlustin)
• [CHA-3315] Pin Wildix production to v239.4.1 (PR: #17266, Author: @Loschcode)
• [CHA-5552] Reduce Bumble message history DB fanout (PR: #17322, Author: @thesyncim)
• Release v239.7.0 (PR: #17324, Author: @stream-ci-bot)