Clerk middleware for resolvers working

[raheeqi]

Goal: Improve security and get the graph ql resolvers working again

• Global Clerk authentication middleware (clerkMiddleware()) for user verification via JWT, so no more manual auth middleware
• Helper function getUserFromHeaders decodes the JWT from request headers to verify the user in each resolver, helps readability and decreases LOC
• The userID from decoded JWT ensures that each request is tied to the authenticated user
• Eliminates the need for manually parsing the JWT in each resolver
• Using decodedToken.sub for filtering data specific to the authenticated user, rather than the old code using args.userID directly
• verifying the JWT on every request
• separating middleware and JWT verification logic from resolver logic

[am5815]

looks good