perf(db): сжать схему PostgreSQL 18 и повторно загрузить SQLite

При первом рестарте wipe всех таблиц и импорт из SQLite в компактную схему. Retention через DROP PARTITION, lz4 и AIO worker.

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

backend/src/services/poller.ts

@@ -1,5 +1,5 @@
-import { eq, lt } from "drizzle-orm"
-import { db, pool } from "../db/index.js"
+import { eq } from "drizzle-orm"
+import { db, dbQuery, pool } from "../db/index.js"
 import { dropExpiredPartitions, ensurePartitionsAround } from "../db/partitions.js"
 import { servers, serverSnapshots } from "../db/schema.js"
 import type { SnapshotInsert } from "../db/schema.js"
@@ -82,11 +82,18 @@ export async function pollServer(serverId: number): Promise<SnapshotRead> {
     .values(partialSnap as SnapshotInsert)
     .returning()
 
-  const cutoffIso = new Date(Date.now() - 14 * 24 * 3600_000).toISOString()
-  await db.delete(serverSnapshots).where(lt(serverSnapshots.polledAt, cutoffIso))
+  if (inserted) {
+    await dbQuery(
+      `UPDATE server_snapshots
+       SET raw_interfaces = NULL, raw_ip_addresses = NULL
+       WHERE server_id = $1 AND polled_at < $2
+         AND (raw_interfaces IS NOT NULL OR raw_ip_addresses IS NOT NULL)`,
+      [serverId, inserted.polledAt],
+    )
+  }
   void dropExpiredPartitions(pool).then(() => ensurePartitionsAround(pool))
 
-  return toSnapshotRead(inserted)
+  return toSnapshotRead(inserted!)
 }
 
 // ── helper ─────────────────────────────────────────────────────────────────────