feat(db): перевести хранилище с SQLite на PostgreSQL

При старте backend накатывает схему PostgreSQL 18 и, если база пустая, один раз импортирует mikrotik.db с тома. Повторный старт не копирует данные. Бэкап в UI идёт через pg_dump.

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

backend/src/services/poller.ts

@@ -1,5 +1,6 @@
-import { eq } from "drizzle-orm"
-import { db } from "../db/index.js"
+import { eq, lt } from "drizzle-orm"
+import { db, 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"
 import type { SnapshotRead } from "../types/server.js"
@@ -14,12 +15,11 @@ import { invalidateFlowCatalogCache } from "./traffic-flow-topology.js"
  * and sync the server's display name from system/identity.
  */
 export async function pollServer(serverId: number): Promise<SnapshotRead> {
-  const server = db
+  const server = (await db
     .select()
     .from(servers)
     .where(eq(servers.id, serverId))
-    .limit(1)
-    .all()[0]
+    .limit(1))[0]
 
   if (!server) {
     throw new Error(`Server with id=${serverId} not found`)
@@ -61,15 +61,14 @@ export async function pollServer(serverId: number): Promise<SnapshotRead> {
       cpuLoad,
       freeMemory:     freeMem,
       totalMemory:    totalMem,
-      rawInterfaces:  JSON.stringify(ifaces),
-      rawIpAddresses: JSON.stringify(addresses),
+      rawInterfaces:  ifaces,
+      rawIpAddresses: addresses,
     } satisfies Partial<SnapshotInsert>)
 
     if ((identity.name || "") !== (server.name || "")) {
-      db.update(servers)
+      await db.update(servers)
         .set({ name: identity.name, updatedAt: now })
         .where(eq(servers.id, serverId))
-        .run()
       invalidateFlowCatalogCache()
     }
 
@@ -78,11 +77,14 @@ export async function pollServer(serverId: number): Promise<SnapshotRead> {
     console.warn(`[poller] server id=${serverId} unreachable:`, (err as Error).message)
   }
 
-  const [inserted] = db
+  const [inserted] = await db
     .insert(serverSnapshots)
     .values(partialSnap as SnapshotInsert)
     .returning()
-    .all()
+
+  const cutoffIso = new Date(Date.now() - 14 * 24 * 3600_000).toISOString()
+  await db.delete(serverSnapshots).where(lt(serverSnapshots.polledAt, cutoffIso))
+  void dropExpiredPartitions(pool).then(() => ensurePartitionsAround(pool))
 
   return toSnapshotRead(inserted)
 }