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/include/config.php

@@ -10,6 +10,47 @@ define('CONF_DIR',    SCRIPTS_DIR . '/Configurations');
 define('LOG_DIR',     '/var/log/varaverk');
 unset($_vv_cfg);
 
+// Push master.conf to all remote hosts via scp after a local save.
+// Returns one result entry per remote found in master.conf.
+// Silently returns [] on non-owner hosts (no SSH key, no remote access).
+function vv_push_master_conf(): array {
+    $myHostId = vv_detect_host();
+    $vars     = vv_conf_vars();
+    $sshKey   = $vars[strtoupper($myHostId) . '_SSH_KEY'] ?? '';
+    if (!$sshKey || !file_exists($sshKey)) return [];
+
+    $localPath = CONF_DIR . '/master.conf';
+    $master    = vv_read_conf_raw('master.conf');
+    preg_match_all('/^\s*(HOST\d+)(?:_NAME)?\s*=\s*["\']?(\S+?)["\']?\s*$/m', $master, $m);
+
+    $results = [];
+    $seen    = [];
+    foreach ($m[1] as $i => $hostKey) {
+        $hostId = strtolower($hostKey);
+        if ($hostId === $myHostId || isset($seen[$hostId])) continue;
+        $seen[$hostId] = true;
+
+        $hostname = trim($m[2][$i]);
+        $ip = vv_resolve_tailscale_ip($hostname);
+        if (!$ip) {
+            $results[] = ['host' => $hostKey, 'ok' => false, 'error' => 'Tailscale IP not found'];
+            continue;
+        }
+
+        $dest = escapeshellarg('root@' . $ip . ':' . CONF_DIR . '/master.conf');
+        $cmd  = 'scp -i ' . escapeshellarg($sshKey)
+              . ' -o ConnectTimeout=10 -o StrictHostKeyChecking=no'
+              . ' ' . escapeshellarg($localPath) . ' ' . $dest . ' 2>&1';
+        exec($cmd, $out, $rc);
+        $results[] = [
+            'host'  => $hostKey,
+            'ok'    => $rc === 0,
+            'error' => $rc !== 0 ? implode('; ', $out) : '',
+        ];
+    }
+    return $results;
+}
+
 function vv_get_hostname(): string {
     return trim(shell_exec('hostname -s') ?: '');
 }