fix: add missing email reply validation (#1934)

## Description

General fixes to the email domain features

Changes made:
- Add "email" validation for "Reply-To email" fields
- Fix issue where you can't remove the "Reply-To" email after it's set
- Fix issue where setting the "Sender email" back to Documenso would
still send using the org/team pref

packages/lib/jobs/definitions/emails/send-document-cancelled-emails.handler.ts

@@ -48,7 +48,7 @@ export const run = async ({
       type: 'team',
       teamId: document.teamId,
     },
-    meta: document.documentMeta || null,
+    meta: document.documentMeta,
   });
 
   const { documentMeta, user: documentOwner } = document;

packages/lib/jobs/definitions/emails/send-recipient-signed-email.handler.ts

@@ -76,7 +76,7 @@ export const run = async ({
       type: 'team',
       teamId: document.teamId,
     },
-    meta: document.documentMeta || null,
+    meta: document.documentMeta,
   });
 
   const assetBaseUrl = NEXT_PUBLIC_WEBAPP_URL() || 'http://localhost:3000';

packages/lib/jobs/definitions/emails/send-rejection-emails.handler.ts

@@ -68,7 +68,7 @@ export const run = async ({
       type: 'team',
       teamId: document.teamId,
     },
-    meta: document.documentMeta || null,
+    meta: document.documentMeta,
   });
 
   const i18n = await getI18nInstance(emailLanguage);

packages/lib/jobs/definitions/emails/send-signing-email.handler.ts

@@ -86,7 +86,7 @@ export const run = async ({
         type: 'team',
         teamId: document.teamId,
       },
-      meta: document.documentMeta || null,
+      meta: document.documentMeta,
     });
 
   const customEmail = document?.documentMeta;