[WIP] Use compiled queries

Elwig/Helpers/Export/ElwigData.cs

@@ -41,7 +41,7 @@ namespace Elwig.Helpers.Export {
                 List<WbGl> currentWbGls;
 
                 using (var ctx = new AppDbContext()) {
-                    branches = await ctx.Branches.ToDictionaryAsync(b => b.ZwstId);
+                    branches = await ctx.FetchBranches().ToDictionaryAsync(b => b.ZwstId);
                     currentDids = await ctx.Deliveries
                         .GroupBy(d => d.Year)
                         .ToDictionaryAsync(g => g.Key, g => g.Max(d => d.DId));