refactor: remove obsolete resource download and installer endpoints

- Deleted the `POST /resources/get/{dataFolder?}` and `GET /resources/get-installer` endpoints as part of the architectural shift towards simplified resource management.
- Removed associated methods and configurations, including `ResourcesService.GetEncryptedResource`, `ResourcesService.GetInstaller`, and related properties in `ResourcesConfig`.
- Cleaned up environment variables and configuration files to reflect the removal of installer-related settings.
- Eliminated the `GetResourceRequest` DTO and its validator, along with the `WrongResourceName` error code.
- Updated documentation to clarify the changes in resource handling and the retirement of per-user file encryption.

Co-authored-by: Cursor <cursoragent@cursor.com>

Azaion.AdminApi/Program.cs

@@ -261,48 +261,6 @@ app.MapPost("/resources/clear/{dataFolder?}",
     .RequireAuthorization(apiAdminPolicy)
     .WithSummary("Clear folder");
 
-app.MapPost("/resources/get/{dataFolder?}", //Need to have POST method for secure password
-    async ([FromBody]GetResourceRequest request, [FromRoute]string? dataFolder, IAuthService authService,
-        IResourcesService resourcesService, CancellationToken ct) =>
-    {
-        var user = await authService.GetCurrentUser();
-        if (user == null)
-            throw new UnauthorizedAccessException();
-
-        var key = Security.GetApiEncryptionKey(user.Email, request.Password);
-        var stream = await resourcesService.GetEncryptedResource(dataFolder, request.FileName, key, ct);
-
-        return Results.File(stream, "application/octet-stream", request.FileName);
-    }).RequireAuthorization()
-    .WithSummary("Gets encrypted by user's Password resource. POST method for secure password");
-
-app.MapGet("/resources/get-installer",
-        async (IAuthService authService, IResourcesService resourcesService, CancellationToken ct) =>
-        {
-            var user = await authService.GetCurrentUser();
-            if (user == null)
-                throw new UnauthorizedAccessException();
-            var (name, stream) = resourcesService.GetInstaller(isStage: false);
-            if (stream == null)
-                throw new FileNotFoundException("Installer file was not found!");
-            return Results.File(stream, "application/octet-stream", name);
-        }).RequireAuthorization()
-    .WithSummary("Gets latest installer");
-
-app.MapGet("/resources/get-installer/stage",
-        async (IAuthService authService, IResourcesService resourcesService, CancellationToken ct) =>
-        {
-            var user = await authService.GetCurrentUser();
-            if (user == null)
-                throw new UnauthorizedAccessException();
-            var (name, stream) = resourcesService.GetInstaller(isStage: true);
-            if (stream == null)
-                throw new FileNotFoundException("Installer file was not found!");
-            return Results.File(stream, "application/octet-stream", name);
-        }).RequireAuthorization()
-    .WithSummary("Gets latest installer");
-
-
 app.MapPost("/classes",
     async (CreateDetectionClassRequest request, IValidator<CreateDetectionClassRequest> validator,
         IDetectionClassService detectionClassService, CancellationToken ct) =>