mvc: use internal class/field representation on API error

Before:

[OPNsense.IDS.IDS.general.ips] value should be a boolean (0,1)

After:

[OPNsense\IDS\IDS:general.ips] value should be a boolean (0,1)

(cherry picked from commit 0d6a8336)

src/opnsense/mvc/app/models/OPNsense/Base/BaseModel.php

@@ -493,7 +493,7 @@ abstract class BaseModel
         if ($messages->count() > 0) {
             $exception_msg = "";
             foreach ($messages as $msg) {
-                $exception_msg_part = "[".str_replace("\\", ".", get_class($this)).".".$msg-> getField(). "] ";
+                $exception_msg_part = "[".get_class($this).":".$msg->getField()."] ";
                 $exception_msg_part .= $msg->getMessage();
                 $exception_msg .= "$exception_msg_part\n";
                 // always log validation errors