fix: complete caller analytics reliability remediation

prisma/schema.prisma

@@ -1045,6 +1045,32 @@ model CallerAnalysisAlert {
   @@map("caller_analysis_alerts")
 }
 
+model CallerAnalysisGap {
+  id        String   @id @db.Char(64)
+  nodeId    String   @map("node_id") @db.VarChar(64)
+  kind      String   @db.VarChar(64)
+  status    String   @db.VarChar(20)
+  startedAt DateTime @map("started_at") @db.DateTime(3)
+  endedAt   DateTime? @map("ended_at") @db.DateTime(3)
+  payload   Json
+  createdAt DateTime @map("created_at") @db.DateTime(3)
+  updatedAt DateTime @map("updated_at") @db.DateTime(3)
+  @@index([status, startedAt], map: "caller_gaps_status")
+  @@map("caller_analysis_gaps")
+}
+
+model CallerAnalysisDeadLetter {
+  id        String   @id @db.Char(64)
+  streamId  String   @map("stream_id") @db.VarChar(64)
+  payload   Json
+  error     String   @db.VarChar(500)
+  status    String   @db.VarChar(20)
+  createdAt DateTime @map("created_at") @db.DateTime(3)
+  updatedAt DateTime @map("updated_at") @db.DateTime(3)
+  @@index([status, createdAt], map: "caller_dead_status")
+  @@map("caller_analysis_dead_letters")
+}
+
 model IdempotencyKey {
   id             String            @id @db.VarChar(40)
   key            String            @unique @db.VarChar(128)