GAP WP3.0: Generisches, editierbares Register-Datenmodell + Editor

Verwaltete Register (GAP-Report §5.2) sind nicht mehr nur benannte Dokumente,
sondern editierbare Register mit Pflichtspalten und Cross-Links.

- Schema: ManagedRegister (code, title, columns JSON, reviewCycle, responsible,
  supplierLink/assetLink) + RegisterRow (values JSON, supplierRef, assetRef).
  Migration + RLS; in TENANT_MODELS.
- import-managed.ts: 7 generische Register (REG-PROJECTS, -SENS-ROLES, -AUDIT-PLAN,
  -EXT-SERVICES, -SW-WHITELIST, -CRIT-SERVICES, -NET) mit definierten Pflichtspalten
  + Cross-Link-Flags; legt Register-Dokument (Bibliothek/Link) UND ManagedRegister-
  Definition idempotent an (RegisterRow bleibt bei Re-Import erhalten).
- actions/register.ts: addRegisterRow/updateRegisterRow/deleteRegisterRow
  (Modul policies, policy:write; Werte gegen die Pflichtspalten, optional Lieferant/Asset).
- components/generic-register.tsx: editierbare Zeilen-Tabelle + Cross-Link-Selects
  (Lieferant = Asset SUPPLIER/IT_SERVICE, Asset = alle); in /policies/[code] eingebunden.

Browser-verifiziert: REG-EXT-SERVICES rendert 7 Spalten + Lieferant/Asset-Selects;
Eintrag anlegen persistiert alle Werte. tsc + lint + build + Guard-Check grün.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

prisma/migrations/20260723090004_managed_registers/migration.sql

@@ -0,0 +1,55 @@
+-- CreateTable
+CREATE TABLE "managed_registers" (
+    "id" TEXT NOT NULL,
+    "tenant_id" TEXT NOT NULL,
+    "code" TEXT NOT NULL,
+    "title" TEXT NOT NULL,
+    "description" TEXT,
+    "columns" JSONB NOT NULL DEFAULT '[]',
+    "review_cycle" TEXT,
+    "responsible" TEXT,
+    "supplier_link" BOOLEAN NOT NULL DEFAULT false,
+    "asset_link" BOOLEAN NOT NULL DEFAULT false,
+    "created_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updated_at" TIMESTAMP(3) NOT NULL,
+
+    CONSTRAINT "managed_registers_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateTable
+CREATE TABLE "register_rows" (
+    "id" TEXT NOT NULL,
+    "tenant_id" TEXT NOT NULL,
+    "register_id" TEXT NOT NULL,
+    "values" JSONB NOT NULL DEFAULT '{}',
+    "supplier_ref" TEXT,
+    "asset_ref" TEXT,
+    "order_idx" INTEGER NOT NULL DEFAULT 0,
+    "created_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updated_at" TIMESTAMP(3) NOT NULL,
+
+    CONSTRAINT "register_rows_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateIndex
+CREATE INDEX "managed_registers_tenant_id_idx" ON "managed_registers"("tenant_id");
+
+-- CreateIndex
+CREATE UNIQUE INDEX "managed_registers_tenant_id_code_key" ON "managed_registers"("tenant_id", "code");
+
+-- CreateIndex
+CREATE INDEX "register_rows_tenant_id_register_id_idx" ON "register_rows"("tenant_id", "register_id");
+
+-- AddForeignKey
+ALTER TABLE "register_rows" ADD CONSTRAINT "register_rows_register_id_fkey" FOREIGN KEY ("register_id") REFERENCES "managed_registers"("id") ON DELETE CASCADE ON UPDATE CASCADE;
+
+
+-- RLS für die neuen mandantenbezogenen Tabellen.
+DO $$
+DECLARE t text;
+BEGIN
+  FOREACH t IN ARRAY ARRAY['managed_registers','register_rows'] LOOP
+    EXECUTE format('ALTER TABLE %I ENABLE ROW LEVEL SECURITY', t);
+    EXECUTE format('CREATE POLICY tenant_isolation ON %I USING (tenant_id = current_setting(''app.tenant_id'', true))', t);
+  END LOOP;
+END $$;