chore(github): generic NETLOGON paths, remove mirror scripts

Replace \\B26\\NETLOGON with \\dc.contoso.local\\NETLOGON.
Remove scripts/ mirror tools and tools/Push-KalinamallOnly.ps1.
Sanitize login_monitor.settings.example (placeholders, no secrets).
Simplify update-rdp-monitor.ps1 to use origin remote only.
Keep dev tooling under tools/ only.

Co-authored-by: Cursor <cursoragent@cursor.com>

Deploy-LoginMonitor.ps1

@@ -1,4 +1,4 @@
-<#
+<#
 .SYNOPSIS
     Доставка Login_Monitor.ps1 с файловой шары по версии (домен: ПК и серверы).
 .DESCRIPTION
@@ -828,7 +828,7 @@ function Get-RdpMonitorSacBlockFromExample {
     return @(
         '# --- Security Alert Center (SAC) ---'
         '$UseSAC = ''fallback'''
-        '$SacUrl = ''https://sac.kalinamall.ru'''
+        '$SacUrl = ''https://sac.example.com'''
         '$SacApiKey = ''sac_CHANGE_ME'''
     ) -join "`r`n"
 }