feat(db): add maintenance_policy migration 000025

Добавлены таблицы maintenance_policy и maintenance_policy_config_audit для postgres и sqlite; в postgres_maintenance_audit — колонка policy_id.

Co-authored-by: Cursor <[email protected]>

migrations/sqlite/000025_maintenance_policies.down.sql

@@ -0,0 +1,5 @@
+ALTER TABLE postgres_maintenance_audit DROP COLUMN policy_id;
+
+DROP TABLE IF EXISTS maintenance_policy_config_audit;
+
+DROP TABLE IF EXISTS maintenance_policy;

migrations/sqlite/000025_maintenance_policies.up.sql

@@ -0,0 +1,29 @@
+CREATE TABLE IF NOT EXISTS maintenance_policy (
+    id TEXT PRIMARY KEY,
+    name TEXT NOT NULL,
+    table_name TEXT NOT NULL,
+    condition_sql TEXT NOT NULL DEFAULT 'true',
+    retention_period_sec INTEGER,
+    max_rows INTEGER,
+    vacuum_strategy TEXT NOT NULL DEFAULT 'none',
+    schedule_cron TEXT NOT NULL,
+    enabled INTEGER NOT NULL DEFAULT 1,
+    dry_run_enabled INTEGER NOT NULL DEFAULT 0,
+    last_run_at TEXT,
+    last_status TEXT,
+    last_error TEXT,
+    created_at TEXT NOT NULL,
+    updated_at TEXT NOT NULL
+);
+
+CREATE TABLE IF NOT EXISTS maintenance_policy_config_audit (
+    id TEXT PRIMARY KEY,
+    policy_id TEXT,
+    actor_prefix TEXT NOT NULL,
+    action TEXT NOT NULL,
+    before_json TEXT,
+    after_json TEXT,
+    created_at TEXT NOT NULL
+);
+
+ALTER TABLE postgres_maintenance_audit ADD COLUMN policy_id TEXT;