feat(auth): add detailed logging in JwtAuthGuard and JwtStrategy for better debugging

feat(products): enhance logging in create method to track requests and user details

backend/src/auth/jwt-auth.guard.ts

@@ -10,11 +10,23 @@ export class JwtAuthGuard extends AuthGuard('jwt') {
   }
 
   canActivate(context: ExecutionContext) {
+    const request = context.switchToHttp().getRequest();
+    const authHeader = request.headers.authorization;
+    const path = request.path;
+    const method = request.method;
+    console.log(`[JwtAuthGuard.canActivate] ${method} ${path}`);
+    console.log(`[JwtAuthGuard.canActivate] Authorization header:`, authHeader ? 'YES' : 'NO');
+    
     const isPublic = this.reflector.getAllAndOverride<boolean>(IS_PUBLIC_KEY, [
       context.getHandler(),
       context.getClass(),
     ]);
+    console.log(`[JwtAuthGuard.canActivate] isPublic:`, isPublic);
+    
     if (isPublic) return true;
-    return super.canActivate(context);
+    
+    const result = super.canActivate(context);
+    console.log(`[JwtAuthGuard.canActivate] super.canActivate result:`, result);
+    return result;
   }
 }

backend/src/auth/jwt.strategy.ts

@@ -13,6 +13,9 @@ export class JwtStrategy extends PassportStrategy(Strategy) {
   }
 
   async validate(payload: { sub: number; username: string; role: string; isPremium: boolean }) {
-    return { userId: payload.sub, username: payload.username, role: payload.role ?? 'user', isPremium: payload.isPremium ?? false };
+    console.log('[JwtStrategy.validate] Payload received:', payload);
+    const result = { userId: payload.sub, username: payload.username, role: payload.role ?? 'user', isPremium: payload.isPremium ?? false };
+    console.log('[JwtStrategy.validate] Returning user:', result);
+    return result;
   }
 }