fix(log): the QSO number column was always empty

OrderedIDs scanned qso_date straight into a time.Time. The column holds a
formatted STRING — the repo writes it with Format(isoMillis) and reads it back
through parseTimeLoose everywhere else — so the scan failed on every call, the
index was never built, and omitempty then dropped the zero from the JSON. A
column that shipped blank.

Scans the string and parses only the newest row; the ordering already came from
SQL, so 30 000 parses were never needed.

Tested against a real SQLite file with the date stored exactly as the repo
writes it, and with the ids running opposite to the dates — the imported-ADIF
case that is the whole reason this is not the id. It fails without the fix with
the scan error itself.

internal/qso/qso.go

@@ -3195,15 +3195,22 @@ func (r *Repo) OrderedIDs(ctx context.Context) ([]int64, time.Time, error) {
 	}
 	defer rows.Close()
 	out := make([]int64, 0, 4096)
-	var newest time.Time
+	// qso_date is stored as a formatted STRING, not a driver date. Scanning it
+	// into a time.Time silently fails on SQLite, which is how this returned an
+	// error and left the whole column empty.
+	var lastDate string
 	for rows.Next() {
 		var id int64
-		var at time.Time
+		var at string
 		if err := rows.Scan(&id, &at); err != nil {
 			return nil, time.Time{}, err
 		}
 		out = append(out, id)
-		newest = at // ascending, so the last row read is the newest
+		lastDate = at // ascending, so the last row read is the newest
 	}
-	return out, newest, rows.Err()
+	if err := rows.Err(); err != nil {
+		return nil, time.Time{}, err
+	}
+	// Parsed once, for the newest row only — the ordering came from SQL.
+	return out, parseTimeLoose(lastDate), nil
 }