Feat/auth context

[Shantanusongirkar]

Summary

This PR implements the authentication foundation for the backend API by introducing a typed tRPC context and protected procedures. It prepares the backend for upcoming authentication routes and secured endpoints without changing the database schema or frontend implementation.

Changes

Authentication Context

• Added a dedicated context.ts
• Implemented typed createContext
• Added session resolution for incoming requests
• Injected infrastructure dependencies (Prisma, Logger, Socket.IO, BullMQ)

tRPC

• Added typed Context
• Implemented protectedProcedure
• Added authentication middleware for protected routes
• Preserved existing publicProcedure

API Integration

• Integrated the new authentication context into the Express tRPC middleware
• Kept existing API routes and middleware unchanged

Testing

Verified locally:

• ✅ API starts successfully
• ✅ TypeScript compiles without errors
• ✅ Public procedures remain accessible
• ✅ Protected procedures return UNAUTHORIZED when no valid session exists
• ✅ Valid sessions authenticate successfully
• ✅ Expired sessions are rejected

Notes

• No Prisma schema changes
• No database migrations required for this feature
• No frontend modifications
• No role middleware implemented yet
• Authentication routers will be implemented in a separate PR

[mergify]

Tick the box to add this pull request to the merge queue (same as @mergifyio queue).

• Queue this pull request