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/wailsjs/go/main/App.d.ts

@@ -1202,6 +1202,8 @@ export function SetPSUOutput(arg1:boolean):Promise<void>;
 
 export function SetPassphrase(arg1:string):Promise<void>;
 
+export function SetScpClublogEnabled(arg1:boolean):Promise<void>;
+
 export function SetScpEnabled(arg1:boolean):Promise<void>;
 
 export function SetSpotMax(arg1:number):Promise<void>;