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 <cursoragent@cursor.com>

backend/src/db/migrate.ts

@@ -1,9 +1,9 @@
-import { readFileSync } from "node:fs"
+import { readdirSync, readFileSync } from "node:fs"
 import { dirname, join } from "node:path"
 import { fileURLToPath } from "node:url"
 import type { Pool } from "pg"
 
-const MIGRATION_ID = "0000_postgresql"
+const FIRST_MIGRATION = "0000_postgresql.sql"
 
 function migrationsDir(): string {
   const here = dirname(fileURLToPath(import.meta.url))
@@ -14,7 +14,7 @@ function migrationsDir(): string {
   ]
   for (const dir of candidates) {
     try {
-      readFileSync(join(dir, `${MIGRATION_ID}.sql`), "utf8")
+      readFileSync(join(dir, FIRST_MIGRATION), "utf8")
       return dir
     } catch {
       /* try next */
@@ -23,6 +23,10 @@ function migrationsDir(): string {
   throw new Error("Не найден backend/drizzle/0000_postgresql.sql")
 }
 
+function migrationId(file: string): string {
+  return file.replace(/\.sql$/i, "")
+}
+
 export async function applySqlMigrations(pool: Pool): Promise<void> {
   await pool.query(`
     CREATE TABLE IF NOT EXISTS schema_migrations (
@@ -30,14 +34,21 @@ export async function applySqlMigrations(pool: Pool): Promise<void> {
       applied_at TIMESTAMPTZ NOT NULL DEFAULT now()
     )
   `)
-  const { rows } = await pool.query<{ id: string }>(
-    `SELECT id FROM schema_migrations WHERE id = $1`,
-    [MIGRATION_ID],
+  const dir = migrationsDir()
+  const files = readdirSync(dir)
+    .filter((f) => /^\d{4}_.+\.sql$/i.test(f))
+    .sort((a, b) => a.localeCompare(b))
+  const applied = new Set(
+    (await pool.query<{ id: string }>(`SELECT id FROM schema_migrations`)).rows.map((r) => r.id),
   )
-  if (rows.length > 0) return
-  const sql = readFileSync(join(migrationsDir(), `${MIGRATION_ID}.sql`), "utf8")
-  await pool.query(sql)
-  await pool.query(`INSERT INTO schema_migrations (id) VALUES ($1) ON CONFLICT (id) DO NOTHING`, [
-    MIGRATION_ID,
-  ])
+  for (const file of files) {
+    const id = migrationId(file)
+    if (applied.has(id)) continue
+    const sql = readFileSync(join(dir, file), "utf8")
+    await pool.query(sql)
+    await pool.query(
+      `INSERT INTO schema_migrations (id) VALUES ($1) ON CONFLICT (id) DO NOTHING`,
+      [id],
+    )
+  }
 }