perf: add composite index on (formId, createdAt) for App_RoutingForms_FormResponse (calcom#27252)

* perf: add composite index on (formId, createdAt) for App_RoutingForms_FormResponse

Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>

* chore: add migration for formId, createdAt composite index

Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>

* Update migration.sql

---------

Co-authored-by: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>

Author: keithwillcode

packages/prisma/migrations/20260126173100_add_form_response_formid_createdat_index/migration.sql

@@ -0,0 +1,2 @@
+-- CreateIndex
+CREATE INDEX "App_RoutingForms_FormResponse_formId_createdAt_idx" ON "App_RoutingForms_FormResponse"("formId", "createdAt");

packages/prisma/schema.prisma

@@ -1360,6 +1360,7 @@ model App_RoutingForms_FormResponse {
   @@unique([formFillerId, formId])
   @@index([formFillerId])
   @@index([formId])
+  @@index([formId, createdAt])
   @@index([routedToBookingUid])
 }