feat: materialize award references into the QSO row (award_refs column)

Award refs are now computed once and stored on the QSO as a JSON column
(award_refs, e.g. {"DDFM":"74","WAJA":"12"}) instead of recomputing the whole
award engine on every grid page load. Written on log/edit/UDP-import and
bulk-recomputed when an award definition or reference list changes; a one-time
per-logbook backfill materializes pre-existing QSOs. The grid reads the column
directly like any other field, so it's fast and available everywhere (including
the shared MySQL logbook).

Also fix per-profile grid column layout: the DB copy was already per-profile,
but the localStorage cache used one global namespace and shadowed it, so a
profile switch kept the previous profile's columns/widths. gridPrefs now scopes
the cache by active profile id and the grids remount on profile:changed.

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

@@ -666,6 +666,8 @@ export function QSOAudioRestart():Promise<boolean>;
 
 export function QuitApp():Promise<void>;
 
+export function RecomputeAllAwardRefs():Promise<number>;
+
 export function RefreshCtyDat():Promise<main.CtyDatInfo>;
 
 export function RefreshSolar():Promise<void>;

frontend/wailsjs/go/main/App.js

@@ -1290,6 +1290,10 @@ export function QuitApp() {
   return window['go']['main']['App']['QuitApp']();
 }
 
+export function RecomputeAllAwardRefs() {
+  return window['go']['main']['App']['RecomputeAllAwardRefs']();
+}
+
 export function RefreshCtyDat() {
   return window['go']['main']['App']['RefreshCtyDat']();
 }

frontend/wailsjs/go/models.ts

@@ -3648,6 +3648,7 @@ export namespace qso {
 	    my_arrl_sect?: string;
 	    my_vucc_grids?: string;
 	    extras?: Record<string, string>;
+	    award_refs?: string;
 	    // Go type: time
 	    created_at: any;
 	    // Go type: time
@@ -3785,6 +3786,7 @@ export namespace qso {
 	        this.my_arrl_sect = source["my_arrl_sect"];
 	        this.my_vucc_grids = source["my_vucc_grids"];
 	        this.extras = source["extras"];
+	        this.award_refs = source["award_refs"];
 	        this.created_at = this.convertValues(source["created_at"], null);
 	        this.updated_at = this.convertValues(source["updated_at"], null);
 	    }