feat(db): 0005 路由注册表——exact/collision 双键 + NULLS NOT DISTINCT 唯一

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

apps/api/drizzle/0005_fine_dark_phoenix.sql

@@ -0,0 +1,33 @@
+CREATE TYPE "public"."route_kind" AS ENUM('html', 'asset', 'redirect', 'gone', 'dynamic', 'unresolved');--> statement-breakpoint
+CREATE TYPE "public"."route_query_policy" AS ENUM('ignore', 'exact', 'preserve', 'dynamic');--> statement-breakpoint
+CREATE TABLE "route_registry" (
+	"id" uuid PRIMARY KEY DEFAULT gen_random_uuid() NOT NULL,
+	"site_id" uuid NOT NULL,
+	"host" text NOT NULL,
+	"source_path_raw" text NOT NULL,
+	"route_path" text NOT NULL,
+	"exact_route_key" text NOT NULL,
+	"collision_key" text NOT NULL,
+	"query_policy" "route_query_policy" NOT NULL,
+	"query_key" text,
+	"source_status" text NOT NULL,
+	"target_status" text NOT NULL,
+	"route_kind" "route_kind" NOT NULL,
+	"target_content_id" uuid,
+	"target_file" text,
+	"redirect_status" integer,
+	"redirect_location" text,
+	"indexable" boolean NOT NULL,
+	"priority" integer NOT NULL,
+	"source_snapshot_id" uuid,
+	"verification_status" text NOT NULL,
+	"created_at" timestamp with time zone DEFAULT now() NOT NULL,
+	"updated_at" timestamp with time zone DEFAULT now() NOT NULL
+);
+--> statement-breakpoint
+ALTER TABLE "route_registry" ADD CONSTRAINT "route_registry_site_id_sites_id_fk" FOREIGN KEY ("site_id") REFERENCES "public"."sites"("id") ON DELETE no action ON UPDATE no action;--> statement-breakpoint
+ALTER TABLE "route_registry" ADD CONSTRAINT "route_registry_source_snapshot_id_source_snapshots_id_fk" FOREIGN KEY ("source_snapshot_id") REFERENCES "public"."source_snapshots"("id") ON DELETE no action ON UPDATE no action;--> statement-breakpoint
+-- ↓ 手写追加（drizzle-kit 0.31 不生成 NULLS NOT DISTINCT 子句，schema 层故意的未声明该索引）：
+--   纯路径唯一——query_key 为 NULL 的路由也参与唯一（spec §5.6 要求数据库级强制，不用哨兵值；
+--   默认 NULLS DISTINCT 下两行 NULL 不冲突，挡不住纯路径重复）。
+CREATE UNIQUE INDEX route_exact_uq ON route_registry (site_id, host, exact_route_key, query_key) NULLS NOT DISTINCT;

apps/api/drizzle/meta/_journal.json

@@ -36,6 +36,13 @@
       "when": 1792497336007,
       "tag": "0004_last_victor_mancha",
       "breakpoints": true
+    },
+    {
+      "idx": 5,
+      "version": "7",
+      "when": 1792498347954,
+      "tag": "0005_fine_dark_phoenix",
+      "breakpoints": true
     }
   ]
 }