[PM-3797 Part 4] Add Sends to new Key Rotation (#3442)

* add send validation

* add send repo methods

* add send rotation to delegate list

* add success test

src/Core/Tools/Repositories/ISendRepository.cs

@@ -1,5 +1,6 @@
 #nullable enable
 
+using Bit.Core.Auth.UserFeatures.UserKey;
 using Bit.Core.Repositories;
 using Bit.Core.Tools.Entities;
 
@@ -33,4 +34,12 @@ public interface ISendRepository : IRepository<Send, Guid>
     /// The task's result contains the loaded <see cref="Send"/>s.
     /// </returns>
     Task<ICollection<Send>> GetManyByDeletionDateAsync(DateTime deletionDateBefore);
+
+    /// <summary>
+    /// Updates encrypted data for sends during a key rotation
+    /// </summary>
+    /// <param name="userId">The user that initiated the key rotation</param>
+    /// <param name="sends">A list of sends with updated data</param>
+    UpdateEncryptedDataForKeyRotation UpdateForKeyRotation(Guid userId,
+        IEnumerable<Send> sends);
 }