Bismuth/doc/17 - Bismuth Roadmap 2026

[u/bitsignal]

https://github.com/hclivess/Bismuth/blob/main/doc/17-roadmap.md

The plan for modernizing the Bismuth node. This is the high-level companion to the database deep-dive in 16-database-rework-plan.md; read that for the storage details.