fix(udp): send the structured QSO Logged too, not only the ADIF one

The ADIF datagram reached Logger32's socket and still nothing appeared in its
log. WSJT-X sends TWO messages for every contact — QSO Logged (type 5), the
structured one, and Logged ADIF (type 12) — and receivers differ on which they
read: MacLoggerDX takes the structured one by default and offers the ADIF as
an option. We were sending only the half Logger32 does not use.

Both now go out on that row, in WSJT-X's own order. Nothing double-logs: any
receiver built for WSJT-X already sees both from the real thing.

Type 5 is read positionally, so the field order is pinned by a test against
NetworkMessage.hpp — one field out of place shifts every one after it and the
receiver files nonsense without complaining. QDateTime is Qt's own encoding:
Julian day, milliseconds since midnight, then the time spec, which is sent as
UTC (1) because a spec of 0 would have the receiver re-read the contact in its
own zone. The Julian arithmetic is checked against known values; a day out
there files every QSO on the wrong date.

changelog.json

@@ -12,7 +12,7 @@
       "QSL Manager, paper QSL: the route is set per direction — bureau, direct or electronic, beside the sent status and beside the received one — and applies to the whole selection at once.",
       "Motorized antenna: when the controller settles somewhere other than where it was told, the log says so — that reads as “the antenna stopped responding” otherwise.",
       "UDP: an outbound message now logs that it was sent, and a logged QSO with no outbound ADIF row configured says so once.",
-      "UDP: new outbound “WSJT-X logged QSO” for Logger32 — its extra UDP sockets speak the WSJT-X protocol and silently ignore plain-text ADIF.",
+      "UDP: new outbound “WSJT-X logged QSO” for Logger32 and anything else on the WSJT-X interface. It sends both messages WSJT-X itself sends for a contact — the structured QSO Logged and the ADIF one — since receivers differ on which they read.",
       "Appearance: the Sahara theme is lighter, parchment rather than deep sand, with a terracotta accent."
     ],
     "fr": [
@@ -25,7 +25,7 @@
       "Gestionnaire QSL, QSL papier : la voie se règle par sens — bureau, direct ou électronique, à côté du statut envoyé et à côté du statut reçu — et s’applique à toute la sélection d’un coup.",
       "Antenne motorisée : quand le contrôleur se fixe ailleurs que là où on l’a envoyé, le journal le dit — sans quoi cela ressemble à une antenne qui ne répond plus.",
       "UDP : un message sortant inscrit désormais son envoi dans le journal, et un QSO enregistré sans ligne ADIF sortante le signale une fois.",
-      "UDP : nouvelle sortie « QSO enregistré WSJT-X » pour Logger32 — ses sockets UDP supplémentaires parlent le protocole WSJT-X et ignorent l’ADIF en texte brut.",
+      "UDP : nouvelle sortie « QSO enregistré WSJT-X » pour Logger32 et tout ce qui parle l’interface WSJT-X. Elle envoie les deux messages que WSJT-X émet lui-même pour un contact — le QSO structuré et l’ADIF — car les récepteurs ne lisent pas le même.",
       "Apparence : le thème Sahara s’éclaircit, parchemin plutôt que sable profond, avec un accent terre cuite."
     ]
   },