feat(hamqth): upload the whole log in one file

The per-QSO API is the only correct way to send a SELECTION, and at the
pace it must be driven a 14k backlog costs the better part of an hour.
HamQTH's other endpoint takes a whole log as one file — and REPLACES
what is on the site with it: its documentation says plainly that partial
uploads do not exist. So it is offered as its own deliberate act behind
a confirmation, never as the batch path behind 'send these', where it
would delete every QSO the operator had not selected.

Scoped to the callsign this profile uploads as, so a database holding
two operators' contacts cannot push one into the other's log; tar.gz
above 12 MB because the ceiling is 20 and a six-figure log passes it as
text; and every QSO not already stamped is marked sent afterwards, in
bulk, so the backlog list agrees with reality.

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

@@ -1397,6 +1397,8 @@ export function UpdateQSOsFromQRZ(arg1:Array<number>):Promise<number>;
 
 export function UploadCallsign(arg1:string):Promise<string>;
 
+export function UploadFullLogHamQTH():Promise<void>;
+
 export function UploadQSOsManual(arg1:string,arg2:Array<number>):Promise<void>;
 
 export function WatchlistAdd(arg1:string,arg2:boolean):Promise<void>;