Actualiza toolkit operativo y documentación

coolify_skill/scripts/Invoke-CoolifyApi.ps1

@@ -47,8 +47,12 @@ if ($PSBoundParameters.ContainsKey("BodyJson")) {
         throw "BodyJson is not valid JSON: $($_.Exception.Message)"
     }
 
-    $request.Body = $BodyJson
-    $request.ContentType = "application/json"
+    # Send bytes, not a string. PowerShell 5.1 encodes a string body using the
+    # default codepage, so any non-ASCII character (an accented comment inside a
+    # compose file, for instance) reaches Coolify mangled and it answers
+    # 400 {"message":"Invalid request.","error":"Invalid JSON."}.
+    $request.Body = [Text.Encoding]::UTF8.GetBytes($BodyJson)
+    $request.ContentType = "application/json; charset=utf-8"
 }
 
 try {