feat: add Album model, artist/search/upload controllers, requireArtist middleware

src/middlewares/roles.js

@@ -16,3 +16,20 @@ export const requireAdmin = async (req, res, next) => {
     return next(error);
   }
 };
+
+export const requireArtist = async (req, res, next) => {
+  try {
+    if (!req.userId) {
+      return res.status(401).json({ success: false, message: 'Unauthorized' });
+    }
+
+    const user = await User.findById(req.userId).select('role').lean();
+    if (!user || (user.role !== 'artist' && user.role !== 'admin')) {
+      return res.status(403).json({ success: false, message: 'Forbidden' });
+    }
+
+    return next();
+  } catch (error) {
+    return next(error);
+  }
+};