feat(engine): finalize unification archives atomically

packages/infra/prisma/game.prisma

@@ -416,6 +416,19 @@ model Emperor {
   @@map("emperior")
 }
 
+model UnificationFinalization {
+  generationKey String   @id @map("generation_key")
+  serverId      String   @unique @map("server_id")
+  profileName   String   @map("profile_name")
+  winnerNation  Int      @map("winner_nation")
+  year          Int
+  month         Int
+  completedAt   DateTime @map("completed_at")
+  createdAt     DateTime @default(now()) @map("created_at")
+
+  @@map("unification_finalization")
+}
+
 model Troop {
   troopLeaderId Int    @id @map("troop_leader")
   nationId      Int    @map("nation")

packages/infra/prisma/migrations/20260731001000_add_unification_finalization/migration.sql

@@ -0,0 +1,24 @@
+ALTER TABLE "ng_old_nations"
+ALTER COLUMN "server_id" TYPE TEXT;
+
+ALTER TABLE "ng_old_generals"
+ALTER COLUMN "server_id" TYPE TEXT;
+
+ALTER TABLE "emperior"
+ALTER COLUMN "server_id" TYPE TEXT;
+
+CREATE TABLE "unification_finalization" (
+    "generation_key" TEXT NOT NULL,
+    "server_id" TEXT NOT NULL,
+    "profile_name" TEXT NOT NULL,
+    "winner_nation" INTEGER NOT NULL,
+    "year" INTEGER NOT NULL,
+    "month" INTEGER NOT NULL,
+    "completed_at" TIMESTAMP(3) NOT NULL,
+    "created_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+
+    CONSTRAINT "unification_finalization_pkey" PRIMARY KEY ("generation_key")
+);
+
+CREATE UNIQUE INDEX "unification_finalization_server_id_key"
+ON "unification_finalization" ("server_id");

packages/infra/src/turnEngineDb.ts

@@ -310,6 +310,7 @@ export interface TurnEngineNationUpdateInput {
     chiefGeneralId: number | null;
     gold: number;
     rice: number;
+    tech: number;
     level: number;
     typeCode: string;
     meta: InputJsonValue;