The Discord embed metadata sometimes returns thumbnail/image fields as
plain URL strings (e.g., "thumbnail":"https://...") instead of the
expected object format ({"url":"...","width":...,"height":...}).
Since serde deserializes the entire PageResult<MessageRecord> in one call,
even one message with a string-format embed field caused the entire response
to fail, making the message section appear empty despite the API returning
valid data.
Added a custom deserializer deser_embed_media that accepts null, a string
(interpreted as URL), or an object (standard struct deserialization).
Applied to both image and thumbnail fields in EmbedInfo with #[serde(default)]
so missing fields don't error. Includes 5 unit tests covering all formats.
asepharyana
42ad1b4231