refactor: max token; migrate.

scripts/export_db.ps1

@@ -0,0 +1,12 @@
+$ErrorActionPreference = "Stop"
+
+$scriptDir = Split-Path -Parent $MyInvocation.MyCommand.Path
+$projectRoot = Resolve-Path (Join-Path $scriptDir "..")
+
+Push-Location $projectRoot
+try {
+    go run ./cmd/export_sql @args
+}
+finally {
+    Pop-Location
+}