Fix spurious 0300_0002 error notification via HMS array path (#583)

The previous fix only filtered status codes (< 0x4000) from the
  print_error field. Firmware can also send the same false positive
  through the hms array in MQTT, which had no such filter. Apply the
  same < 0x4000 check to the HMS parser so status/phase indicators
  are skipped regardless of which MQTT field carries them.

backend/app/services/bambu_mqtt.py

@@ -1854,6 +1854,11 @@ class BambuMQTTClient:
                         severity = (attr >> 8) & 0xF
                         # Module is in attr byte 3 (bits 24-31)
                         module = (attr >> 24) & 0xFF
+                        # Skip non-error status codes — all real HMS errors
+                        # have code >= 0x4000. Lower values are status/phase
+                        # indicators that some firmware sends during normal printing.
+                        if code < 0x4000:
+                            continue
                         self.state.hms_errors.append(
                             HMSError(
                                 code=f"0x{code:x}" if code else "0x0",

backend/tests/integration/test_print_lifecycle.py

@@ -236,7 +236,7 @@ class TestTimelapseTracking:
             {
                 "print": {
                     "gcode_state": "RUNNING",
-                    "hms": [{"attr": 0x07000002, "code": 0x1234}],  # Filament module error
+                    "hms": [{"attr": 0x07000002, "code": 0x8001}],  # Filament module error (code must be >= 0x4000)
                 }
             }
         )