Embed code of canidate along with the links to the S3 files to download upon acceptance

[jsmilliken]

https://sourceallies.slack.com/archives/C07Q8HMTT1B/p1748528994295799

Basically embed the code in the acceptance message - limited to a certain number of lines/length.

Technically might be doable no matter the length if we upload real files to the message.