v1.5.1: Startup warning if PC not registered in ShopDB

- Check API response on startup for "Unknown hostname" error
- Display warning if PC not in ShopDB machines table
- Skip API calls if PC not registered (avoid repeated failures)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

eDNC-SpecialCharFix.ps1

@@ -36,9 +36,10 @@
 
 .NOTES
     Author: GE Aerospace - Rutland
-    Version: 1.5.0
+    Version: 1.5.1
     Date: 2025-12-12
 
+    v1.5.1 - Startup warning if PC not registered in ShopDB
     v1.5.0 - API logging:
     - Logs events (started, cleaned, ok, failed, error, stopped) to ShopDB API
     - Tracks installations and stats per hostname
@@ -82,7 +83,7 @@ param(
 )
 
 # Script info
-$ScriptVersion = "1.5.0"
+$ScriptVersion = "1.5.1"
 $ScriptName = "eDNC Special Character Fix"
 
 # Auto-update settings
@@ -222,6 +223,9 @@ function Send-DNCEvent {
         [string]$Message = ""
     )
 
+    # Skip if API is disabled (PC not registered or API unreachable)
+    if (-not $script:ApiEnabled) { return }
+
     try {
         $body = @{
             action = "logDNCEvent"
@@ -260,8 +264,31 @@ Show-Header -Status "Watching for files... (Ctrl+C to stop)" | Out-Null
 Write-Host "Removing bytes: $($CharactersToRemove -join ', ') (0x$($CharactersToRemove | ForEach-Object { '{0:X2}' -f $_ } | Join-String -Separator ', 0x'))" -ForegroundColor DarkGray
 Write-Host ""
 
-# Log startup to API
-Send-DNCEvent -EventType "started" -Message "Script started"
+# Log startup to API and check if PC is registered
+$script:ApiEnabled = $true
+try {
+    $body = @{
+        action = "logDNCEvent"
+        hostname = $script:Hostname
+        eventType = "started"
+        version = $ScriptVersion
+        message = "Script started"
+    }
+    $response = Invoke-WebRequest -Uri $ApiUrl -Method POST -Body $body -ContentType "application/x-www-form-urlencoded" -UseBasicParsing -TimeoutSec 5
+    $json = $response.Content | ConvertFrom-Json
+    if ($json.success -eq $false -and $json.error -match "Unknown hostname") {
+        $script:ApiEnabled = $false
+        Write-Host "WARNING: This PC ($($script:Hostname)) is not registered in ShopDB." -ForegroundColor Yellow
+        Write-Host "         Activity will NOT be logged. Add this PC to ShopDB to enable logging." -ForegroundColor Yellow
+        Write-Host ""
+    }
+}
+catch {
+    # API unreachable - continue without logging
+    $script:ApiEnabled = $false
+    Write-Host "WARNING: Cannot reach ShopDB API. Activity will NOT be logged." -ForegroundColor Yellow
+    Write-Host ""
+}
 
 # Statistics
 $script:FilesProcessed = 0