chore: add createdAt to organisation #13 (#41)

* added createdAt field for organisations

* added migrations.sql

* fix: Use proper migration filename

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Co-authored-by: TheMythologist <leekaixuan2001@gmail.com>

Author: Shir0-Kage

prisma/migrations/20251221150600_organisation_created_at/migration.sql

@@ -0,0 +1,2 @@
+-- AlterTable
+ALTER TABLE "public"."organisations" ADD COLUMN     "created_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP;

prisma/schema.prisma

@@ -41,6 +41,7 @@ model Organisation {
     category    IGCategory
     isInactive  Boolean     @default(false) @map("is_inactive")
     isInvisible Boolean     @default(false) @map("is_invisible") // is not displayed on the website
+    createdAt   DateTime    @default(now()) @map("created_at")
 
     @@map("organisations")
 }