fix(e2e): use lean schema for OIDC test endpoint; add trailing newline

Fix CTO review comments on GRO-392:

- POST /api/setup/auth-provider/test now uses authProviderTestSchema
  (only issuerUrl + internalBaseUrl) instead of full
  authProviderBootstrapSchema — clientSecret is not needed for OIDC
  discovery and was not being sent by the frontend handler
- POST /api/admin/auth-provider/test already uses omit() correctly;
  no change needed
- apps/api/src/routes/admin/authProvider.ts: added trailing newline

Co-Authored-By: Paperclip <noreply@paperclip.ing>

apps/api/src/routes/admin/authProvider.ts

@@ -187,4 +187,4 @@ authProviderRouter.delete("/", requireSuperUser(), async (c) => {
   await db.delete(authProviderConfig).where(eq(authProviderConfig.id, existing.id));
 
   return c.json({ ok: true, message: "Auth provider config removed; auth will fall back to env vars" });
-});
+});