added emote reaction support, better emote support in reactions, implemented llm refusal and retry logic, improved some inline documentation

prisma/schema.prisma

@@ -28,3 +28,14 @@ model User {
   userFqn         String    @unique
   lastRespondedTo DateTime?
 }
+
+model Reaction {
+  id         Int      @id @default(autoincrement())
+  statusId   String   // The Pleroma status ID we reacted to
+  emojiName  String   // The emoji we used to react
+  reactedAt  DateTime @default(now())
+  createdAt  DateTime @default(now())
+  
+  @@unique([statusId]) // Prevent multiple reactions to same status
+  @@map("reactions")
+}