## Summary
- Adds `announceOnDiscourse` module to post announcements to the NHCarrigan Discourse support forum (category 16), tagged by announcement type
- Adds `chunkContent` utility to split long announcements at paragraph/line boundaries for Discord (2000 chars), Reddit (40,000 chars), and Discourse (32,000 chars); Reddit overflows chain as nested replies, Discord as sequential messages, Discourse as sequential replies
- Refactors the announcement route to run all platforms concurrently via `Promise.allSettled`, ensuring a failure on any one platform never blocks the others, with all results reported back
- Fixes generation failure response from incorrect `201` to `500`
✨ This PR was created with love from Hikari~ 🌸
Reviewed-on: #17
Co-authored-by: Hikari <hikari@nhcarrigan.com>
Co-committed-by: Hikari <hikari@nhcarrigan.com>
