feat(brief): Sase 360° evening brief — page + worker job + Telegram@20:00

Daily Sase brief aggregating VIN decode health, catalog coverage gaps,
revenue (Stripe/iyzico TRY), users/subscriptions, PostHog behavior + UTM
source, Meta ads (env-gated), and the insight pipeline into one
critical-points-first report.

- Brief model (panel DB): one row/project/day (date, headline, summary,
  health score, structured body, raw 360 metrics).
- Panel: getSaseBriefMetrics() (saseDb half) + /api/internal/sase-brief-data.
- Worker: sase-evening-brief job collects panel metrics + PostHog
  (hogqlQuery) + Meta (lib/meta, env-gated) + pipeline stats -> DeepSeek
  structured brief -> upsert Brief -> Telegram. Scheduled 17:00 UTC
  (20:00 Europe/Istanbul).
- UI: /projects/sase/briefs (table of days) + /briefs/[id] (detail:
  critical-first, sections by status, recommendations, raw metrics).

Meta dormant until META_ACCESS_TOKEN/META_AD_ACCOUNT_ID set on the worker.
Needs a `briefs` table migration on the panel DB before first run.

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

apps/web/prisma/schema.prisma

@@ -292,6 +292,30 @@ model Insight {
   @@map("insights")
 }
 
+// Daily evening brief — one 360° report per project per day. Generated by the
+// worker (sase-evening-brief job) from Sase DB + PostHog + Meta + pipeline, then
+// rendered at /projects/sase/briefs and pushed to Telegram at 20:00.
+model Brief {
+  id            String   @id @default(cuid())
+  projectKey    String   @default("sase")
+  briefDate     DateTime @db.Date
+  status        String   @default("generated") // generated | failed
+  headline      String   @db.Text
+  summary       String   @db.Text
+  healthScore   Int      @default(0)
+  body          Json // structured: { critical[], sections[], recommendations[] }
+  metrics       Json // raw 360 aggregates that fed the LLM (audit + page render)
+  telegramSent  Boolean  @default(false)
+  sourceModel   String   @default("")
+  sourceCostUsd Float    @default(0)
+  createdAt     DateTime @default(now())
+  updatedAt     DateTime @updatedAt
+
+  @@unique([projectKey, briefDate])
+  @@index([projectKey, briefDate(sort: Desc)])
+  @@map("briefs")
+}
+
 model CostLedger {
   id                       String   @id @default(cuid())
   insightId                String?