🔒 security: add auth token validation via Redis and DB check

src/modules/userSession/repositories/checkUserSession.repository.ts

@@ -0,0 +1,16 @@
+import { AppError } from "../../../helpers/error/instances/app";
+import { userSessionModel } from "../userSession.model";
+
+export const checkUserSessionRepository = async (sessionId: string) => {
+  try {
+    return await userSessionModel.findUnique({
+      where: {
+        id: sessionId,
+        isAuthenticated: true,
+        deletedAt: null,
+      },
+    });
+  } catch (error) {
+    throw new AppError(500, "Database error during session validation", error);
+  }
+};