fix: парсинг RTT формата Xms Yus от RouterOS

monitor.py

@@ -109,23 +109,42 @@ def mikrotik_ping(api, address: str) -> Optional[float]:
             },
         )
 
-        log.info("DEBUG ping %s raw response: %s", address, results)
+        def parse_rtt(val) -> Optional[float]:
+            """Парсит '3ms674us', '2ms', '500us' → миллисекунды (float)."""
+            if isinstance(val, bytes):
+                val = val.decode()
+            val = val.strip()
+            if not val:
+                return None
+            ms, us = 0.0, 0.0
+            if "ms" in val:
+                parts = val.split("ms")
+                try:
+                    ms = float(parts[0])
+                except ValueError:
+                    pass
+                if len(parts) > 1 and "us" in parts[1]:
+                    try:
+                        us = float(parts[1].replace("us", ""))
+                    except ValueError:
+                        pass
+            elif "us" in val:
+                try:
+                    us = float(val.replace("us", ""))
+                except ValueError:
+                    pass
+            total = ms + us / 1000.0
+            return total if total > 0 else None
 
         rtts = []
         for row in results:
-            log.info("DEBUG row: %s", row)
-            # Пробуем все возможные ключи где может быть rtt
-            for key in (b"time", b"avg-rtt", b"rtt", b"avg"):
-                time_val = row.get(key, b"").decode().replace("ms", "").strip()
-                if time_val:
-                    try:
-                        rtts.append(float(time_val))
-                        break
-                    except ValueError:
-                        pass
+            # Берём avg-rtt из последней строки (она накопительная)
+            rtt = parse_rtt(row.get("avg-rtt", ""))
+            if rtt is not None:
+                rtts.append(rtt)
 
         if rtts:
-            return sum(rtts) / len(rtts)
+            return rtts[-1]  # последняя строка содержит финальный avg
         return None
 
     except Exception as exc: