feat: gérer l'ordre des champs personnalisés

prisma/migrations/20251107140000_custom_field_order/migration.sql

@@ -0,0 +1,18 @@
+-- Introduce an order index for custom fields so their ordering can be persisted.
+
+ALTER TABLE "custom_fields"
+ADD COLUMN "orderIndex" INTEGER NOT NULL DEFAULT 0;
+
+WITH ranked AS (
+  SELECT
+    "id",
+    ROW_NUMBER() OVER (
+      PARTITION BY "typeMachineId", "typeComposantId", "typePieceId"
+      ORDER BY "createdAt", "id"
+    ) - 1 AS rn
+  FROM "custom_fields"
+)
+UPDATE "custom_fields"
+SET "orderIndex" = ranked.rn
+FROM ranked
+WHERE ranked."id" = "custom_fields"."id";

prisma/schema.prisma

@@ -245,6 +245,7 @@ model CustomField {
   required     Boolean  @default(false)
   defaultValue String?
   options      String[] // Pour les champs de type SELECT
+  orderIndex   Int      @default(0)
   createdAt    DateTime @default(now())
   updatedAt    DateTime @updatedAt