feat(iit): Implement event-level QC architecture V3.1 with dynamic rule filtering, report deduplication and AI intent enhancement

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/prisma/migrations/20260208134925_add_cra_qc_engine_support/migration.sql

@@ -0,0 +1,30 @@
+-- CRA 智能质控引擎支持
+-- 扩展 IitSkill 表，新增 IitQcReport 表
+
+-- AlterTable: 扩展 skills 表支持 CRA 五大规则体系
+ALTER TABLE "iit_schema"."skills" ADD COLUMN     "level" TEXT NOT NULL DEFAULT 'normal',
+ADD COLUMN     "priority" INTEGER NOT NULL DEFAULT 100,
+ADD COLUMN     "required_tags" TEXT[] DEFAULT ARRAY[]::TEXT[],
+ADD COLUMN     "rule_type" TEXT NOT NULL DEFAULT 'HARD_RULE';
+
+-- CreateTable: 质控报告存储表
+CREATE TABLE "iit_schema"."qc_reports" (
+    "id" TEXT NOT NULL,
+    "project_id" TEXT NOT NULL,
+    "report_type" TEXT NOT NULL DEFAULT 'daily',
+    "summary" JSONB NOT NULL,
+    "issues" JSONB NOT NULL,
+    "llm_report" TEXT NOT NULL,
+    "generated_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "expires_at" TIMESTAMP(3),
+
+    CONSTRAINT "qc_reports_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateIndex: 报告索引
+CREATE INDEX "idx_qc_report_project_type" ON "iit_schema"."qc_reports"("project_id", "report_type");
+
+CREATE INDEX "idx_qc_report_generated" ON "iit_schema"."qc_reports"("generated_at");
+
+-- CreateIndex: Skill 触发类型索引
+CREATE INDEX "idx_iit_skill_active_trigger" ON "iit_schema"."skills"("is_active", "trigger_type");