feat(hamlog): read confirmations back from a HAMLOG.online ADIF

Their agent protocol has no download verb, so the return path is a file
exported from their site. Running that file through the ordinary ADIF
import is the wrong tool and does real damage: it matches on callsign +
UTC minute + band + mode, their export is rebuilt from their own
database and rarely agrees to the minute, and 'update duplicates' then
inserts everything that failed to match -- several hundred copies of
contacts already in the log.

This path matches only. It stamps the confirmation on QSOs it finds,
falls back to the mode-CLASS key for the modes their export renames, and
REPORTS what it could not match instead of adding it: an unmatched
confirmation is a question about the log, not a contact to create.

Also logs and reports how many rows a delete actually removed -- silence
there made a delete that did nothing indistinguishable from one that
worked.

frontend/wailsjs/go/models.ts

@@ -2699,6 +2699,28 @@ export namespace main {
 		    return a;
 		}
 	}
+	export class HamlogCfmResult {
+	    total: number;
+	    confirmed: number;
+	    matched: number;
+	    by_class: number;
+	    unmatched: number;
+	    samples: string[];
+	
+	    static createFrom(source: any = {}) {
+	        return new HamlogCfmResult(source);
+	    }
+	
+	    constructor(source: any = {}) {
+	        if ('string' === typeof source) source = JSON.parse(source);
+	        this.total = source["total"];
+	        this.confirmed = source["confirmed"];
+	        this.matched = source["matched"];
+	        this.by_class = source["by_class"];
+	        this.unmatched = source["unmatched"];
+	        this.samples = source["samples"];
+	    }
+	}
 	export class ModePreset {
 	    name: string;
 	    default_rst_sent?: string;