feat(hamqth): QSO upload to the HamQTH logbook — the 8th external service

qso_realtime.php with the account's callbook credentials (which the
external-services config falls back to when its own are blank), one ADIF
record per QSO, prg=OpsLog. HTTP status IS the answer: 200 saved, 400
rejected (a duplicate counts as delivered, like HRDLog's insert 0), 403
credentials. Sent-state lives in APP_OPSLOG_HAMQTH_SENT extras like
HAMLOG.online — ADIF names no HamQTH field. Auto-upload on log, on-close
batch, right-click Send to, QSL Manager backlog, and a Test button that
authenticates against the callbook login, which cannot touch the log.

Fixes a real mis-route on the way: manual 'Send to HAMLOG.online' had no
branch in runManualUpload and fell through to QRZ.com — the selection was
uploaded to the wrong service with the QRZ key. Both extras-stamped
services now have their own branch.

changelog.json

@@ -3,10 +3,14 @@
     "version": "0.27.6",
     "date": "",
     "en": [
-      "Switching the settings database no longer shows “OpsLog is already running”: the automatic relaunch now waits for the closing instance to release its lock instead of racing it."
+      "Switching the settings database no longer shows “OpsLog is already running”: the automatic relaunch now waits for the closing instance to release its lock instead of racing it.",
+      "HamQTH upload: 8th external service — real-time QSO upload to the HamQTH online logbook with your callbook credentials (auto-upload on log, “Send to…” right-click, QSL Manager backlog upload, connection test).",
+      "Fixed: the right-click “Send to HAMLOG.online” was uploading the selection to QRZ.com with the QRZ key — it now goes to HAMLOG.online."
     ],
     "fr": [
-      "Changer de base de réglages n’affiche plus « OpsLog is already running » : la relance automatique attend désormais que l’instance qui se ferme libère son verrou au lieu de la prendre de vitesse."
+      "Changer de base de réglages n’affiche plus « OpsLog is already running » : la relance automatique attend désormais que l’instance qui se ferme libère son verrou au lieu de la prendre de vitesse.",
+      "Upload HamQTH : 8e service externe — envoi des QSO en temps réel vers le logbook HamQTH avec vos identifiants du lookup (upload auto au log, « Envoyer vers… » au clic droit, rattrapage via le QSL Manager, test de connexion).",
+      "Corrigé : le clic droit « Envoyer vers HAMLOG.online » envoyait la sélection à QRZ.com avec la clé QRZ — elle part maintenant vers HAMLOG.online."
     ]
   },
   {