fix: Use server.identifier instead of server.id in import

Discovery returns 'identifier' field, not 'id'.

Signed-off-by: Claude (Chronicler #61) <claude@firefrostgaming.com>

services/arbiter-3.0/src/routes/admin/scheduler.js

@@ -340,7 +340,7 @@ router.post('/import-servers', async (req, res) => {
             // Check if server already exists
             const existing = await db.query(
                 'SELECT id FROM server_restart_schedules WHERE server_id = $1',
-                [server.id]
+                [server.identifier]
             );
             
             if (existing.rows.length === 0) {
@@ -354,7 +354,7 @@ router.post('/import-servers', async (req, res) => {
                 await db.query(
                     `INSERT INTO server_restart_schedules (server_id, server_name, node, sort_order)
                      VALUES ($1, $2, $3, $4)`,
-                    [server.id, server.name, node, sortOrder]
+                    [server.identifier, server.name, node, sortOrder]
                 );
                 imported++;
             }