feat: implement mqtt ingestion, parsing, and archive pipeline

backend/tests/mqtt/test_mixed_parser.py

@@ -0,0 +1,27 @@
+from app.mqtt.parsers.mixed import parse_mixed_payload
+from app.mqtt.parsers.nmea import parse_nmea_sentences
+
+
+def test_parse_nmea_sentences_extracts_gga_and_rmc() -> None:
+    payload = (
+        b"$GPGGA,123519,3723.2475,N,12158.3416,W,1,12,0.8,10.0,M,-25.0,M,,*65\r\n"
+        b"$GPRMC,123520,A,3723.2475,N,12158.3416,W,0.13,309.62,120598,,,A*74\r\n"
+    )
+
+    events = parse_nmea_sentences(payload)
+
+    assert {e["event_type"] for e in events} >= {"nmea_gga", "nmea_rmc"}
+
+
+def test_parse_mixed_payload_returns_rtcm_summary() -> None:
+    payload = (
+        b"$GPGSV,1,1,04,02,17,213,40,05,29,121,37,12,66,314,44,25,14,048,39*71\r\n"
+        + b"\xd3\x00\x04"
+        + b"\x43\x50\x00\x00"
+        + b"\x00\x00\x00"
+    )
+
+    events = parse_mixed_payload(payload)
+
+    event_types = {event["event_type"] for event in events}
+    assert "rtcm_summary" in event_types