Optimize Data Persistence (Batching)

[samarkun23]

Current Issue: Currently messages.worker.ts writes every single stroke/message to the database one by one. In a busy room, this will overwhelm Prisma/PostgreSQL.

Improvement: Message Batching.

• Modify the worker to collect messages in a small buffer (e.g., for 500ms or until 50 messages) and use prisma.chatSchema.createMany() to save them in one go.
  Result: Drastically reduces the number of database connections and write operations.