feat(clublog): the matches come home, and Club Log lends its call list

Two new QSO columns, clublog_qso_download_status/date — a Club Log MATCH,
the service's own confirmation (both stations uploaded the QSO, paired
within 15 minutes). Full promoted-column lockstep: migration 0031, repo
insert/scan, ADIF dictionary + import + export (app-defined
CLUBLOG_QSO_DOWNLOAD_*), table columns, filter builder, bulk edit and the
QSO editor's Club Log row.

The QSL Manager's Club Log entry now actually downloads: getmatches.php
with the existing account settings and the embedded application key,
incremental via the match-completion date filter, matched call+band+mode
±15 min with a mode-blind fallback because Club Log reports 'false' for
modes it cannot infer. Matches always exist on both sides, so unmatched
ones are listed rather than skeleton-added.

And Super Check Partial can merge Club Log's weekly SCP list (~180k calls
worked on the air in the last 3 years) with MASTER.SCP — an opt-in
checkbox under the SCP setting.

frontend/src/components/BulkEditModal.tsx

@@ -46,6 +46,8 @@ const FIELDS: FieldDef[] = [
   { id: 'qrz_rcvd_date',     label: 'bulk.fQrzRcvdDate',     group: 'QSL / upload', kind: 'date' },
   { id: 'clublog_sent',      label: 'bulk.fClublogSent',     group: 'QSL / upload', kind: 'status' },
   { id: 'clublog_sent_date', label: 'bulk.fClublogSentDate', group: 'QSL / upload', kind: 'date' },
+  { id: 'clublog_rcvd',      label: 'bulk.fClublogRcvd',     group: 'QSL / upload', kind: 'status' },
+  { id: 'clublog_rcvd_date', label: 'bulk.fClublogRcvdDate', group: 'QSL / upload', kind: 'date' },
   { id: 'hrdlog_sent',       label: 'bulk.fHrdlogSent',      group: 'QSL / upload', kind: 'status' },
   { id: 'hrdlog_sent_date',  label: 'bulk.fHrdlogSentDate',  group: 'QSL / upload', kind: 'date' },
   // HAMLOG.online: no promoted column, written into extras_json (see