Ack SLA requests immediately

handlers/system.py

@@ -607,6 +607,7 @@ async def incidents_export(msg: Message):
 async def backup_sla(msg: Message):
     if not is_admin_msg(msg):
         return
+    await msg.answer("⏳ Checking Backup SLA…", reply_markup=backup_kb)
     rc, out = await run_cmd_full(["restic", "snapshots", "--json"], use_restic_env=True, timeout=40)
     if rc != 0:
         await msg.answer(f"⚠️ Restic error: {out.strip() or rc}", reply_markup=backup_kb)
@@ -724,6 +725,7 @@ async def openwrt_leases_diff(msg: Message):
 async def queue_sla(msg: Message):
     if not is_admin_msg(msg):
         return
+    await msg.answer("⏳ Calculating Queue SLA…", reply_markup=backup_kb)
     hist = get_history_raw()
     if not hist:
         await msg.answer("🧾 Queue SLA: history is empty", reply_markup=backup_kb)