feat: openapi support plus more api validation

server/routes/auth/callback/oidc.get.ts

@@ -1,6 +1,14 @@
 import sessionHandler from "~/server/internal/session";
 import { enabledAuthManagers } from "~/server/plugins/04.auth-init";
 
+defineRouteMeta({
+  openAPI: {
+    tags: ["Auth"],
+    description: "OIDC Signin callback",
+    parameters: [],
+  },
+});
+
 export default defineEventHandler(async (h3) => {
   if (!enabledAuthManagers.OpenID) return sendRedirect(h3, "/auth/signin");