feat: NPC와 국방 정책 변경을 감사 버전으로 저장

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);