Refactor constant references across multiple files

Updated import statements and changed references from
`Domain.Constants` to `Value` in `APIEnvelopeJob.vb`,
`FinalizeDocumentJob.vb`, `HistoryModel.vb`, `EmailService.vb`,
and job scheduling files. This standardizes constant access
and improves code maintainability and readability.

EnvelopeGenerator.CommonServices/Jobs/APIBackendJobs/APIEnvelopeJob.vb

@@ -5,6 +5,7 @@ Imports Quartz
 Imports System.Security.Cryptography
 Imports DevExpress.DataProcessing
 Imports EnvelopeGenerator.Domain.Entities
+Imports EnvelopeGenerator.Domain.Constants
 
 Namespace Jobs
     Public Class APIEnvelopeJob
@@ -33,7 +34,7 @@ Namespace Jobs
         End Class
 
         Public Function Execute(pContext As IJobExecutionContext) As Task Implements IJob.Execute
-            LogConfig = pContext.MergedJobDataMap.Item(Domain.Constants.LOGCONFIG)
+            LogConfig = pContext.MergedJobDataMap.Item(Value.LOGCONFIG)
             Logger = LogConfig.GetLogger()
             myTempFiles = New TempFiles(LogConfig)
             myTempFiles.Create()
@@ -173,7 +174,7 @@ Namespace Jobs
             ActionService = New ActionService(pState, Database)
         End Sub
         Private Function GetDatabase(pContext As IJobExecutionContext, pLogConfig As LogConfig) As MSSQLServer
-            Dim oConnectionString As String = pContext.MergedJobDataMap.Item(Domain.Constants.DATABASE)
+            Dim oConnectionString As String = pContext.MergedJobDataMap.Item(Value.DATABASE)
             Dim Database = New MSSQLServer(pLogConfig, MSSQLServer.DecryptConnectionString(oConnectionString))
 
             Return Database