feat(03-01): Zone schema, migration, and tenant scoping

- Add Zone model (id, tenantId, name, description, isActive)
- Add ZoneAssignment model (collector-to-zone join table)
- Replace Subscriber.zone String? with Subscriber.zoneId FK to Zone
- Add Zone + ZoneAssignment to TENANT_SCOPED_MODELS with full operation blocks
- Add "Zone" to AppSubjects in types.ts
- Grant OFFICE_STAFF manage Zone, COLLECTOR read Zone in permissions.ts
- Migration 20260305000000_add_zones applied to DB

prisma/migrations/20260305000000_add_zones/migration.sql

@@ -0,0 +1,57 @@
+-- AlterTable
+ALTER TABLE "Subscriber" DROP COLUMN "zone",
+ADD COLUMN     "zoneId" TEXT;
+
+-- CreateTable
+CREATE TABLE "Zone" (
+    "id" TEXT NOT NULL,
+    "tenantId" TEXT NOT NULL,
+    "name" TEXT NOT NULL,
+    "description" TEXT,
+    "isActive" BOOLEAN NOT NULL DEFAULT true,
+    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updatedAt" TIMESTAMP(3) NOT NULL,
+
+    CONSTRAINT "Zone_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateTable
+CREATE TABLE "ZoneAssignment" (
+    "id" TEXT NOT NULL,
+    "tenantId" TEXT NOT NULL,
+    "userId" TEXT NOT NULL,
+    "zoneId" TEXT NOT NULL,
+    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+
+    CONSTRAINT "ZoneAssignment_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateIndex
+CREATE INDEX "Zone_tenantId_idx" ON "Zone"("tenantId");
+
+-- CreateIndex
+CREATE UNIQUE INDEX "Zone_tenantId_name_key" ON "Zone"("tenantId", "name");
+
+-- CreateIndex
+CREATE INDEX "ZoneAssignment_tenantId_idx" ON "ZoneAssignment"("tenantId");
+
+-- CreateIndex
+CREATE INDEX "ZoneAssignment_userId_idx" ON "ZoneAssignment"("userId");
+
+-- CreateIndex
+CREATE INDEX "ZoneAssignment_zoneId_idx" ON "ZoneAssignment"("zoneId");
+
+-- CreateIndex
+CREATE UNIQUE INDEX "ZoneAssignment_tenantId_userId_zoneId_key" ON "ZoneAssignment"("tenantId", "userId", "zoneId");
+
+-- CreateIndex
+CREATE INDEX "Subscriber_tenantId_zoneId_idx" ON "Subscriber"("tenantId", "zoneId");
+
+-- AddForeignKey
+ALTER TABLE "Subscriber" ADD CONSTRAINT "Subscriber_zoneId_fkey" FOREIGN KEY ("zoneId") REFERENCES "Zone"("id") ON DELETE SET NULL ON UPDATE CASCADE;
+
+-- AddForeignKey
+ALTER TABLE "ZoneAssignment" ADD CONSTRAINT "ZoneAssignment_userId_fkey" FOREIGN KEY ("userId") REFERENCES "User"("id") ON DELETE RESTRICT ON UPDATE CASCADE;
+
+-- AddForeignKey
+ALTER TABLE "ZoneAssignment" ADD CONSTRAINT "ZoneAssignment_zoneId_fkey" FOREIGN KEY ("zoneId") REFERENCES "Zone"("id") ON DELETE RESTRICT ON UPDATE CASCADE;