feat: NPC와 국방 정책 변경을 감사 버전으로 저장

packages/infra/prisma/game.prisma

@@ -1138,3 +1138,30 @@ model PlayAuditGeneral {
   @@index([sampleId, cityId, generalId])
   @@map("play_audit_general")
 }
+
+// 현재 기수의 불변 정책 버전. live nation 삭제와 수명을 분리한다.
+model PlayAuditPolicy {
+  schemaVersion  Int      @default(1) @map("schema_version")
+  id             String   @id
+  serverId       String   @map("server_id")
+  nationId       Int      @map("nation_id")
+  area           String
+  revision       Int
+  previousId     String?  @map("previous_id")
+  source         String
+  year           Int
+  month          Int
+  tick           Int?
+  requestId      String?  @map("request_id")
+  inputSequence  BigInt?  @map("input_sequence")
+  ordinal        Int
+  actor          Json?
+  before         Json?
+  after          Json
+  hash           String
+  createdAt      DateTime @default(now()) @map("created_at") @db.Timestamptz(3)
+
+  @@unique([serverId, nationId, area, revision])
+  @@index([serverId, nationId, year, month, ordinal])
+  @@map("play_audit_policy")
+}

packages/infra/prisma/migrations/20260916030000_add_play_audit_policy/migration.sql

@@ -0,0 +1,22 @@
+CREATE TABLE "play_audit_policy" (
+  "id" TEXT NOT NULL PRIMARY KEY,
+  "server_id" TEXT NOT NULL,
+  "nation_id" INTEGER NOT NULL,
+  "area" TEXT NOT NULL CHECK ("area" IN ('NPC_VALUES', 'NPC_NATION_PRIORITY', 'NPC_GENERAL_PRIORITY', 'DEFENCE')),
+  "revision" INTEGER NOT NULL CHECK ("revision" > 0),
+  "previous_id" TEXT,
+  "source" TEXT NOT NULL CHECK ("source" IN ('BASELINE', 'CHANGE', 'OBSERVED_GAP')),
+  "year" INTEGER NOT NULL,
+  "month" INTEGER NOT NULL CHECK ("month" BETWEEN 1 AND 12),
+  "tick" INTEGER,
+  "request_id" TEXT,
+  "input_sequence" BIGINT,
+  "ordinal" INTEGER NOT NULL,
+  "actor" JSONB,
+  "before" JSONB,
+  "after" JSONB NOT NULL,
+  "hash" TEXT NOT NULL,
+  "created_at" TIMESTAMPTZ(3) NOT NULL DEFAULT CURRENT_TIMESTAMP
+);
+CREATE UNIQUE INDEX "play_audit_policy_server_id_nation_id_area_revision_key" ON "play_audit_policy" ("server_id", "nation_id", "area", "revision");
+CREATE INDEX "play_audit_policy_server_id_nation_id_year_month_ordinal_idx" ON "play_audit_policy" ("server_id", "nation_id", "year", "month", "ordinal");

packages/infra/prisma/migrations/20260916031000_add_play_audit_policy_schema_version/migration.sql

@@ -0,0 +1 @@
+ALTER TABLE "play_audit_policy" ADD COLUMN "schema_version" INTEGER NOT NULL DEFAULT 1 CHECK ("schema_version" > 0);