Simplify middleware and remove unused code

- Remove unused orgMemberMiddleware (org procedures use helper functions)
- Remove orgMemberProcedure from base.ts
- Simplify superuserMiddleware using inline concat syntax
- Import OrgInfo/OrgMembership from context.ts instead of redefining

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

apps/api-server/src/procedures/base.ts

@@ -9,35 +9,21 @@ import type {
   APIContext,
   AuthenticatedContext,
   LoginRequestContext,
-  OrgMemberContext,
 } from "../context.js";
 import {
   authMiddleware,
   loginRequestMiddleware,
-  orgMemberMiddleware,
   os,
   superuserMiddleware,
 } from "../middlewares/index.js";
 
 // Re-export middlewares and os
-export {
-  authMiddleware,
-  loginRequestMiddleware,
-  orgMemberMiddleware,
-  os,
-  superuserMiddleware,
-};
+export { authMiddleware, loginRequestMiddleware, os, superuserMiddleware };
 
 // Pre-configured procedures with middleware applied
 export const authedProcedure = os.use(authMiddleware);
 export const superuserProcedure = os.use(superuserMiddleware);
 export const loginRequestProcedure = os.use(loginRequestMiddleware);
-export const orgMemberProcedure = os.use(orgMemberMiddleware);
 
 // Type exports for use in procedure files
-export type {
-  APIContext,
-  AuthenticatedContext,
-  LoginRequestContext,
-  OrgMemberContext,
-};
+export type { APIContext, AuthenticatedContext, LoginRequestContext };