feat: expand ExportsController with search and file endpoints

Add list/search, equipment/drawing number lookups, PDF hash tracking,
cut template lookup, DXF zip download, and wire up FileStorageService
and static files in Program.cs.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

FabWorks.Api/Program.cs

@@ -1,3 +1,4 @@
+using FabWorks.Api.Configuration;
 using FabWorks.Api.Services;
 using FabWorks.Core.Data;
 using Microsoft.EntityFrameworkCore;
@@ -9,7 +10,13 @@ builder.Services.AddDbContext<FabWorksDbContext>(options =>
     options.UseSqlServer(builder.Configuration.GetConnectionString("FabWorksDb")));
 builder.Services.AddSingleton<FormProgramService>();
 
+builder.Services.Configure<FileStorageOptions>(
+    builder.Configuration.GetSection(FileStorageOptions.SectionName));
+builder.Services.AddScoped<IFileStorageService, FileStorageService>();
+
 var app = builder.Build();
 
+app.UseDefaultFiles();
+app.UseStaticFiles();
 app.MapControllers();
 app.Run();