Add request-scoped context for session.getUser()

Use AsyncLocalStorage to provide request context so services can access
the current user without needing Call passed through every function.

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

express/services/index.ts

@@ -1,9 +1,10 @@
 // services.ts
 
 import { AuthService } from "../auth";
+import { getCurrentUser } from "../context";
 import { db, migrate, migrationStatus, PostgresAuthStore } from "../database";
 import { getLogs, log } from "../logging";
-import { anonymousUser, type User } from "../user";
+import type { MaybeUser } from "../user";
 
 const database = {
     db,
@@ -29,8 +30,8 @@ const misc = {
 };
 
 const session = {
-    getUser: (): User => {
-        return anonymousUser;
+    getUser: (): MaybeUser => {
+        return getCurrentUser();
     },
 };