feat(backend): add Report model and migration

신고 기능을 위한 Report 모델과 ReportReason/ReportStatus enum 추가.
Post 삭제 시 Report도 cascade 삭제.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: junzero741

apps/backend/prisma/migrations/20260307113021_add_report/migration.sql

@@ -0,0 +1,21 @@
+-- CreateEnum
+CREATE TYPE "ReportReason" AS ENUM ('ILLEGAL_CONTENT', 'DEFAMATION', 'PERSONAL_INFO', 'PHISHING', 'COPYRIGHT', 'OTHER');
+
+-- CreateEnum
+CREATE TYPE "ReportStatus" AS ENUM ('PENDING', 'DISMISSED');
+
+-- CreateTable
+CREATE TABLE "Report" (
+    "id" TEXT NOT NULL,
+    "postId" TEXT NOT NULL,
+    "reason" "ReportReason" NOT NULL,
+    "description" TEXT,
+    "reporterIp" TEXT NOT NULL,
+    "status" "ReportStatus" NOT NULL DEFAULT 'PENDING',
+    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+
+    CONSTRAINT "Report_pkey" PRIMARY KEY ("id")
+);
+
+-- AddForeignKey
+ALTER TABLE "Report" ADD CONSTRAINT "Report_postId_fkey" FOREIGN KEY ("postId") REFERENCES "Post"("id") ON DELETE CASCADE ON UPDATE CASCADE;

apps/backend/prisma/schema.prisma

@@ -22,4 +22,30 @@ model Post {
   expiresAt    DateTime?
   createdAt    DateTime  @default(now())
   updatedAt    DateTime  @updatedAt
+  reports      Report[]
+}
+
+model Report {
+  id          String       @id @default(uuid())
+  post        Post         @relation(fields: [postId], references: [id], onDelete: Cascade)
+  postId      String
+  reason      ReportReason
+  description String?
+  reporterIp  String
+  status      ReportStatus @default(PENDING)
+  createdAt   DateTime     @default(now())
+}
+
+enum ReportReason {
+  ILLEGAL_CONTENT
+  DEFAMATION
+  PERSONAL_INFO
+  PHISHING
+  COPYRIGHT
+  OTHER
+}
+
+enum ReportStatus {
+  PENDING
+  DISMISSED
 }