Fix FastEndpoints/Swagger wiring and missing required fields in DTOs

- Register FastEndpoints, SwaggerDocument, DbContext in Program.cs
- Add DbContextOptions constructor to PyroFetesDbContext
- Add CityId to Show DTOs and endpoints (NOT NULL in DB)
- Add F4T2NumberApproval/F4T2ExpirationDate to Staff DTOs and endpoints
- Simplify DeleteShow to rely on DB cascade instead of manual includes
- Default NOT NULL string fields to empty string on create

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

PyroFetes/Endpoints/Show/DeleteShowEndpoint.cs

@@ -21,12 +21,6 @@ public class DeleteShowEndpoint(PyroFetesDbContext pyroFetesDbContext) : Endpoin
         }
 
         var show = await pyroFetesDbContext.Shows
-            .Include(s => s.ShowTrucks)
-            .Include(s => s.ShowStaffs)
-            .Include(s => s.SoundTimecodes)
-            .Include(s => s.ProductTimecodes)
-            .Include(s => s.Contracts)
-            .Include(s => s.ShowMaterials)
             .FirstOrDefaultAsync(s => s.Id == req.Id.Value, ct);
 
         if (show is null)
@@ -35,16 +29,6 @@ public class DeleteShowEndpoint(PyroFetesDbContext pyroFetesDbContext) : Endpoin
             return;
         }
 
-        // Supprimer les relations associées
-        if (show.ShowTrucks != null && show.ShowTrucks.Any())
-        {
-            pyroFetesDbContext.ShowTrucks.RemoveRange(show.ShowTrucks);
-        }
-
-        // Note: Les autres relations (ShowStaffs, SoundTimecodes, etc.) devront aussi être gérées
-        // en fonction de votre modèle de données et de vos règles métier
-        // Pour l'instant, je laisse juste ShowTrucks comme exemple
-
         pyroFetesDbContext.Shows.Remove(show);
         await pyroFetesDbContext.SaveChangesAsync(ct);