fix: UTF-8 BOM in update SQL files causing MariaDB syntax error

PowerShell 5.1 Out-File -Encoding UTF8 adds BOM (EF BB BF) which
breaks SQL execution on production. Also fix manifest JSON serializing
full PS objects instead of plain strings.

- build-update.ps1: use UTF8Encoding($false) for all file writes
- build-update.ps1: force .ToString() on Get-Content results
- UpdateRepository.php: strip BOM and normalize line endings in executeSql
- Rebuild ver_0.304 package files (clean SQL + manifest)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

build-update.ps1

@@ -32,6 +32,7 @@ param(
 )
 
 $ErrorActionPreference = "Stop"
+$Utf8NoBom = New-Object System.Text.UTF8Encoding $false
 
 # --- Helpers ---
 
@@ -214,7 +215,7 @@ $sqlQueries = @()
 $migrationFile = "migrations/$versionNumber.sql"
 
 if (Test-Path $migrationFile) {
-    $sqlQueries = Get-Content $migrationFile | Where-Object { $_.Trim() -ne '' }
+    $sqlQueries = @(Get-Content $migrationFile | Where-Object { $_.Trim() -ne '' } | ForEach-Object { $_.ToString() })
     Write-Step "Znaleziono migracje SQL: $migrationFile ($($sqlQueries.Count) zapytan)"
 } else {
     Write-Step "Brak migracji SQL ($migrationFile nie istnieje)"
@@ -322,7 +323,7 @@ $manifest = @{
 
 $manifestJson = $manifest | ConvertTo-Json -Depth 4
 $manifestPath = "$updatesDir/ver_${versionNumber}_manifest.json"
-$manifestJson | Out-File $manifestPath -Encoding UTF8
+[System.IO.File]::WriteAllText($manifestPath, $manifestJson, $Utf8NoBom)
 
 Write-Ok "Utworzono manifest: $manifestPath"
 
@@ -330,7 +331,7 @@ Write-Ok "Utworzono manifest: $manifestPath"
 
 if ($sqlQueries.Count -gt 0) {
     $sqlPath = "$updatesDir/ver_${versionNumber}_sql.txt"
-    ($sqlQueries -join "`n") | Out-File $sqlPath -Encoding UTF8 -NoNewline
+    [System.IO.File]::WriteAllText($sqlPath, ($sqlQueries -join "`n"), $Utf8NoBom)
     Write-Ok "Utworzono legacy SQL: $sqlPath"
 }
 
@@ -340,7 +341,7 @@ if ($deletedFilesOnly.Count -gt 0 -or $deletedDirs.Count -gt 0) {
     foreach ($d in $deletedDirs) { $filesContent += "D: ../$d" }
 
     $filesPath = "$updatesDir/ver_${versionNumber}_files.txt"
-    ($filesContent -join "`n") | Out-File $filesPath -Encoding UTF8 -NoNewline
+    [System.IO.File]::WriteAllText($filesPath, ($filesContent -join "`n"), $Utf8NoBom)
     Write-Ok "Utworzono legacy files: $filesPath"
 }
 
@@ -350,7 +351,7 @@ $versionsFile = "updates/versions.php"
 if (Test-Path $versionsFile) {
     $content = Get-Content $versionsFile -Raw
     $content = $content -replace '\$current_ver\s*=\s*\d+;', "`$current_ver = $versionInt;"
-    $content | Out-File $versionsFile -Encoding UTF8 -NoNewline
+    [System.IO.File]::WriteAllText($versionsFile, $content, $Utf8NoBom)
     Write-Ok "Zaktualizowano versions.php: `$current_ver = $versionInt"
 }
 
@@ -363,7 +364,7 @@ if (Test-Path $changelogFile) {
 
     $changelogContent = Get-Content $changelogFile -Raw
     $changelogContent = $newEntry + $changelogContent
-    $changelogContent | Out-File $changelogFile -Encoding UTF8 -NoNewline
+    [System.IO.File]::WriteAllText($changelogFile, $changelogContent, $Utf8NoBom)
     Write-Ok "Zaktualizowano changelog.php"
 }