feat: Prefer content_id instead of inline_content_id

examples/with_inline_attachments.py

@@ -31,11 +31,11 @@
 print("Sent email with local inline attachment")
 print(local_email)
 
-# Send email with remote inline attachment
+# Send email with remote inline attachment using content_id
 remote_attachment: resend.RemoteAttachment = {
     "filename": "remote-resend-wordmark-black.png",
     "path": "https://resend.com/static/brand/resend-wordmark-black.png",
-    "inline_content_id": "my-test-image",
+    "content_id": "my-test-image",  # Using content_id as alternative to inline_content_id
 }
 
 remote_params: resend.Emails.SendParams = {

resend/emails/_attachment.py

@@ -25,6 +25,10 @@ class Attachment(TypedDict):
     """
     inline_content_id: NotRequired[str]
     """
+    Alternative way to set the Content ID for inline attachments (same as content_id)
+    """
+    content_id: NotRequired[str]
+    """
     Content ID for inline attachments used in HTML content with cid: references
     """
 
@@ -40,5 +44,9 @@ class RemoteAttachment(TypedDict):
     """
     inline_content_id: NotRequired[str]
     """
+    Alternative way to set the Content ID for inline attachments (same as content_id)
+    """
+    content_id: NotRequired[str]
+    """
     Content ID for inline attachments used in HTML content with cid: references
     """

tests/emails_test.py

@@ -144,7 +144,7 @@ def test_email_send_with_inline_attachment(self) -> None:
             "filename": "image.png",
             "content": [1, 2, 3, 4, 5],
             "content_type": "image/png",
-            "inline_content_id": "my-image",
+            "content_id": "my-image",
         }
 
         params: resend.Emails.SendParams = {