quote datetime

src/Infrastructure.EntityFramework/Repositories/Queries/UserCipherDetailsQuery.cs

@@ -137,12 +137,12 @@ public class UserCipherDetailsQuery : IQuery<CipherDetails>
                 }
             }
 
-            return default;
+            return null;
         }
         catch
         {
             // Some Archives might be in an invalid format like: '{ "", "<ValidDateTime>" }'
-            return default;
+            return null;
         }
     }
 

src/Sql/dbo/Vault/Stored Procedures/Cipher/CipherDetails_Update.sql

@@ -57,7 +57,7 @@ BEGIN
             WHEN @ArchivedDate IS NOT NULL AND [Archives] IS NULL THEN
                 CONCAT('{', @UserIdKey, ':"', CONVERT(NVARCHAR(30), @ArchivedDate, 127), '"}')
             WHEN @ArchivedDate IS NOT NULL THEN
-                JSON_MODIFY([Archives], @UserIdPath, CONVERT(NVARCHAR(30), @ArchivedDate, 127))
+                JSON_MODIFY([Archives], @UserIdPath, CONCAT('"', CONVERT(NVARCHAR(30), @ArchivedDate, 127), '"'))
             ELSE
                 JSON_MODIFY([Archives], @UserIdPath, NULL)
             END,

util/Migrator/DbScripts/2025-12-10_AddCipherArchives.sql

@@ -466,7 +466,7 @@ BEGIN
             WHEN @ArchivedDate IS NOT NULL AND [Archives] IS NULL THEN
                 CONCAT('{', @UserIdKey, ':"', CONVERT(NVARCHAR(30), @ArchivedDate, 127), '"}')
             WHEN @ArchivedDate IS NOT NULL THEN
-                JSON_MODIFY([Archives], @UserIdPath, CONVERT(NVARCHAR(30), @ArchivedDate, 127))
+                JSON_MODIFY([Archives], @UserIdPath, CONCAT('"', CONVERT(NVARCHAR(30), @ArchivedDate, 127), '"'))
             ELSE
                 JSON_MODIFY([Archives], @UserIdPath, NULL)
             END,