feat(M01-B): 建立核心迁移与MySQL连接池

scripts/dev/windows/check-release-manifest.ps1

@@ -4,6 +4,8 @@ $head = (& git rev-parse HEAD).Trim()
 $shortHead = (& git rev-parse --short HEAD).Trim()
 $backendBuild = if (Test-Path "backend/package.json") { "PROJECT_PRESENT_BUILD_NOT_RUN" } else { "SKIPPED_NO_PROJECT" }
 $adminBuild = if (Test-Path "admin/package.json") { "PROJECT_PRESENT_BUILD_NOT_RUN" } else { "SKIPPED_NO_PROJECT" }
+$migrationFiles = @(Get-ChildItem -Path "database/migrations" -Filter "*.sql" -File -ErrorAction SilentlyContinue)
+$databaseMigration = if ($migrationFiles.Count -gt 0) { "PROJECT_PRESENT_MIGRATION_NOT_RUN" } else { "SKIPPED_NO_MIGRATIONS" }
 
 $rawText = @"
 {
@@ -14,7 +16,7 @@ $rawText = @"
   "backendBuild": "$backendBuild",
   "adminBuild": "$adminBuild",
   "miniappMirror": "RECORDED_SOURCE_COMMIT_ONLY",
-  "databaseMigration": "SKIPPED_NO_MIGRATIONS",
+  "databaseMigration": "$databaseMigration",
   "deployed": false
 }
 "@
@@ -55,8 +57,8 @@ if ((-not (Test-Path "admin/package.json")) -and $manifest.adminBuild -ne "SKIPP
   throw "Dry-run manifest should record missing admin project"
 }
 
-if ($manifest.databaseMigration -ne "SKIPPED_NO_MIGRATIONS") {
-  throw "Dry-run manifest should record skipped migrations until migrations exist"
+if ($manifest.databaseMigration -ne $databaseMigration) {
+  throw "Dry-run manifest databaseMigration mismatch: $($manifest.databaseMigration)"
 }
 
 Write-Host "PASS: release manifest dry-run is valid for current HEAD."