Push master.conf to all partners immediately on raw-editor save

vv_push_master_conf() in config.php: finds all remote HOST* entries,
resolves Tailscale IPs, SCPs master.conf to each.
rawconf.php calls it after a successful write when file=master.conf.
Scheduler save button shows sync status: "✓ Saved · synced to HOST2"
or "✓ Saved · push failed: HOST2" on error.

Also fix path bug in partnership_transfer.sh — was SCPing to
appdata root instead of Configurations/.

Plugin/unraid/api/rawconf.php

@@ -22,7 +22,9 @@ if ($_SERVER['REQUEST_METHOD'] === 'POST') {
         echo json_encode(['ok' => false, 'error' => 'Not allowed']);
         exit;
     }
-    echo json_encode(['ok' => vv_write_conf_raw($file, $content)]);
+    $written = vv_write_conf_raw($file, $content);
+    $push    = ($written && $file === 'master.conf') ? vv_push_master_conf() : [];
+    echo json_encode(['ok' => $written, 'push' => $push]);
     exit;
 }