Remove /api prefix from all routes and fix CityId FK constraint

- Strip /api prefix from all endpoint routes
- Make Show.CityId nullable (no longer required FK)
- Drop CityId FK constraint and alter column to NULL at startup via raw SQL
- Add migration MakeCityIdNullable for schema consistency
- Update Show DTOs to reflect nullable CityId

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

PyroFetes/Endpoints/SoundCategory/CreateSoundCategoryEndpoint.cs

@@ -8,7 +8,7 @@ public class CreateSoundCategoryEndpoint(PyroFetesDbContext pyroFetesDbContext)
 {
     public override void Configure()
     {
-        Post("/api/soundcategorys");
+        Post("/soundcategorys");
         AllowAnonymous();
     }
 

PyroFetes/Endpoints/SoundCategory/DeleteSoundCategoryEndpoint.cs

@@ -8,7 +8,7 @@ public class DeleteSoundCategoryEndpoint(PyroFetesDbContext pf3DbContext) : Endp
 {
     public override void Configure()
     {
-        Delete("/api/soundcategorys/{Id}");
+        Delete("/soundcategorys/{Id}");
         AllowAnonymous();
     }
 

PyroFetes/Endpoints/SoundCategory/GetAllSoundCategoryEndpoint.cs

@@ -8,7 +8,7 @@ public class GetAllSoundCategorysEndpoint(PyroFetesDbContext pf3DbContext) : End
 {
     public override void Configure()
     {
-        Get("/api/soundcategorys");
+        Get("/soundcategorys");
         AllowAnonymous();
     }
 

PyroFetes/Endpoints/SoundCategory/GetSoundCategoryEndpoint.cs

@@ -9,7 +9,7 @@ public class GetSoundCategoryEndpoint(PyroFetesDbContext pf3DbContext) : Endpoin
 {
     public override void Configure()
     {
-        Get("/api/soundcategorys/{Id}");
+        Get("/soundcategorys/{Id}");
         AllowAnonymous();
     }
 

PyroFetes/Endpoints/SoundCategory/UpdateSoundCategoryEndpoint.cs

@@ -9,7 +9,7 @@ public class UpdateSoundCategoryEndpoint(PyroFetesDbContext pf3DbContext) : Endp
 {
     public override void Configure()
     {
-        Patch("/api/soundcategorys/{Id}/name");
+        Patch("/soundcategorys/{Id}/name");
         AllowAnonymous();
     }