feat(controller): add GetAllAsync endpoint to HistoryController

- Added a new `GetAllAsync` method to HistoryController to retrieve envelope histories.
- Included query parameters for filtering by envelopeId, userReference, referenceType, status, and boolean flags for sender and receiver.
- Implemented validation of `referenceType` with `ReferenceType` enum, throwing an error for invalid values.

EnvelopeGenerator.Domain/Entities/EnvelopeHistory.cs

@@ -19,7 +19,7 @@ namespace EnvelopeGenerator.Domain.Entities
 
         [Required]
         [Column("USER_REFERENCE", TypeName = "nvarchar(128)")]
-        public string UserReference { get; set; }
+        public required string UserReference { get; init; }
 
         [Required]
         [Column("STATUS")]