feat(backend): add batch processing and review tasks modules

- Add Prisma migrations for batch processing tables
- Add Prisma migrations for review tasks tables
- Add seed data for testing
- Add prompt templates for review (editorial, methodology)
- Add CloseAI configuration guide
- Add database validation scripts

backend/prisma/migrations/20251014120128_add_review_tasks/migration.sql

@@ -0,0 +1,35 @@
+-- CreateTable
+CREATE TABLE "review_tasks" (
+    "id" TEXT NOT NULL,
+    "user_id" TEXT NOT NULL,
+    "file_name" TEXT NOT NULL,
+    "file_size" INTEGER NOT NULL,
+    "file_path" TEXT,
+    "extracted_text" TEXT NOT NULL,
+    "word_count" INTEGER,
+    "status" TEXT NOT NULL DEFAULT 'pending',
+    "editorial_review" JSONB,
+    "methodology_review" JSONB,
+    "overall_score" DOUBLE PRECISION,
+    "model_used" TEXT,
+    "started_at" TIMESTAMP(3),
+    "completed_at" TIMESTAMP(3),
+    "duration_seconds" INTEGER,
+    "error_message" TEXT,
+    "created_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updated_at" TIMESTAMP(3) NOT NULL,
+
+    CONSTRAINT "review_tasks_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateIndex
+CREATE INDEX "review_tasks_user_id_idx" ON "review_tasks"("user_id");
+
+-- CreateIndex
+CREATE INDEX "review_tasks_status_idx" ON "review_tasks"("status");
+
+-- CreateIndex
+CREATE INDEX "review_tasks_created_at_idx" ON "review_tasks"("created_at");
+
+-- AddForeignKey
+ALTER TABLE "review_tasks" ADD CONSTRAINT "review_tasks_user_id_fkey" FOREIGN KEY ("user_id") REFERENCES "users"("id") ON DELETE CASCADE ON UPDATE CASCADE;