fix: Update email sender parameters in backend code (#2755)

# Description

Please include a summary of the changes and the related issue. Please
also include relevant motivation and context.

## Checklist before requesting a review

Please delete options that are not relevant.

- [ ] My code follows the style guidelines of this project
- [ ] I have performed a self-review of my code
- [ ] I have commented hard-to-understand areas
- [ ] I have ideally added tests that prove my fix is effective or that
my feature works
- [ ] New and existing unit tests pass locally with my changes
- [ ] Any dependent changes have been merged

## Screenshots (if appropriate):

Co-authored-by: Stan Girard <stan@quivr.app>

backend/backend/modules/assistant/ito/ito.py

@@ -112,7 +112,7 @@ class ITO(BaseModel):
             </div>
             """
             params = {
-                "sender": mail_from,
+                "from": mail_from,
                 "to": [mail_to],
                 "subject": "Quivr Ingestion Processed",
                 "reply_to": "no-reply@quivr.app",

backend/backend/modules/brain/service/brain_subscription/resend_invitation_email.py

@@ -42,9 +42,10 @@ def resend_invitation_email(
     try:
         r = send_email(
             {
-                "sender": brains_settings.resend_email_address,
+                "from": brains_settings.resend_email_address,
-                "to": brain_subscription.email,
+                "to": [brain_subscription.email],
                 "subject": "Quivr - Brain Shared With You",
+                "reply_to": "no-reply@quivr.app",
                 "html": html_body,
             }
         )

backend/backend/modules/tools/email_sender.py

@@ -53,7 +53,7 @@ class EmailSenderTool(BaseTool):
         try:
             r = send_email(
                 {
-                    "sender": self.contact_settings.resend_contact_sales_from,
+                    "from": self.contact_settings.resend_contact_sales_from,
                     "to": self.user_email,
                     "reply_to": "no-reply@quivr.app",
                     "subject": "Email from your assistant",