Refactor: unify role constants under new Role class

Replaced all usages of ReceiverRole with the new Role class in EnvelopeGenerator.Domain.Constants. Removed ReceiverRole.cs and added Role.cs with PreAuth and FullyAuth constants. Updated all [Authorize] attributes and role checks in controllers and authentication logic to use Role.FullyAuth and Role.PreAuth. This centralizes role management for improved maintainability and clarity.

EnvelopeGenerator.API/Controllers/AnnotationController.cs

@@ -18,7 +18,7 @@ namespace EnvelopeGenerator.API.Controllers;
 /// <summary>
 /// Manages annotations and signature lifecycle for envelopes.
 /// </summary>
-[Authorize(Roles = ReceiverRole.FullyAuth)]
+[Authorize(Roles = Role.FullyAuth)]
 [ApiController]
 [Route("api/[controller]")]
 public class AnnotationController : ControllerBase
@@ -54,7 +54,7 @@ public class AnnotationController : ControllerBase
     /// </summary>
     /// <param name="psPdfKitAnnotation">Annotation payload.</param>
     /// <param name="cancel">Cancellation token.</param>
-    [Authorize(Roles = ReceiverRole.FullyAuth)]
+    [Authorize(Roles = Role.FullyAuth)]
     [HttpPost]
     [Obsolete("This endpoint is for PSPDF Kit.")]
     public async Task<IActionResult> CreateOrUpdate([FromBody] PsPdfKitAnnotation? psPdfKitAnnotation = null, CancellationToken cancel = default)
@@ -93,7 +93,7 @@ public class AnnotationController : ControllerBase
     /// Rejects the document for the current receiver.
     /// </summary>
     /// <param name="reason">Optional rejection reason.</param>
-    [Authorize(Roles = ReceiverRole.FullyAuth)]
+    [Authorize(Roles = Role.FullyAuth)]
     [HttpPost("reject")]
     [Obsolete("Use MediatR")]
     public async Task<IActionResult> Reject([FromBody] string? reason = null)

EnvelopeGenerator.API/Controllers/DocumentController.cs

@@ -14,7 +14,7 @@ namespace EnvelopeGenerator.API.Controllers;
 /// <remarks>
 /// Initializes a new instance of the <see cref="DocumentController"/> class.
 /// </remarks>
-[Authorize(Roles = ReceiverRole.FullyAuth)]
+[Authorize(Roles = Role.FullyAuth)]
 [ApiController]
 [Route("api/[controller]")]
 public class DocumentController(IMediator mediator, ILogger<DocumentController> logger) : ControllerBase

EnvelopeGenerator.API/Controllers/ReadOnlyController.cs

@@ -37,7 +37,7 @@ public class ReadOnlyController : ControllerBase
     /// </summary>
     /// <param name="createDto">Creation payload.</param>
     [HttpPost]
-    [Authorize(Roles = ReceiverRole.FullyAuth)]
+    [Authorize(Roles = Role.FullyAuth)]
     public async Task<IActionResult> CreateAsync([FromBody] EnvelopeReceiverReadOnlyCreateDto createDto)
     {
         var authReceiverMail = User.GetAuthReceiverMail();

EnvelopeGenerator.API/Controllers/TfaRegistrationController.cs

@@ -111,7 +111,7 @@ public class TfaRegistrationController : ControllerBase
     /// <summary>
     /// Logs out the envelope receiver from cookie authentication.
     /// </summary>
-    [Authorize(Roles = ReceiverRole.FullyAuth)]
+    [Authorize(Roles = Role.FullyAuth)]
     [HttpPost("auth/logout")]
     public async Task<IActionResult> LogOutAsync()
     {