feat(archive): add groups + recordings to the PostHog archive

- groups: posthog-resource-archive now also snapshots group types + group
  instances (groups_types/ + groups/?group_type_index) into
  posthog_resource_snapshots (change-detected).
- recordings: new posthog-recording-archive job (@*/6h) captures complete
  metadata for EVERY recording into posthog_recordings (skipDuplicates over a
  rolling 90d window) + MinIO dump — a superset of the insight pipeline's
  promoted SessionMeta subset. rrweb blobs still archived by archive-recordings.
- /posthog-archive browser: Groups / Group Types tabs + a Recordings tab.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

apps/web/prisma/schema.prisma

@@ -561,6 +561,35 @@ model PosthogResourceSnapshot {
   @@map("posthog_resource_snapshots")
 }
 
+// Complete metadata for EVERY session recording (not just the insight-pipeline's
+// promoted subset in SessionMeta). One row per recording; full list-item payload
+// kept lossless. rrweb blobs themselves are archived separately to MinIO by the
+// archive-recordings job for ingested sessions.
+model PosthogRecording {
+  id                 String    @id // PostHog recording / session id
+  projectKey         String
+  distinctId         String?
+  personName         String?
+  startTime          DateTime?
+  endTime            DateTime?
+  durationSec        Int?
+  activeSeconds      Int?
+  clickCount         Int?
+  keypressCount      Int?
+  mouseActivityCount Int?
+  consoleErrorCount  Int?
+  startUrl           String?
+  ongoing            Boolean   @default(false)
+  properties         Json // full recording list item, lossless
+  capturedAt         DateTime  @default(now())
+  dumpedAt           DateTime?
+
+  @@index([projectKey, startTime])
+  @@index([distinctId])
+  @@index([dumpedAt])
+  @@map("posthog_recordings")
+}
+
 // ---------- Phase C: Sentry archive ----------
 
 // Sentry issue (group) aggregate state. Upserted to the latest snapshot — the