Add a no-database guest profile (servatrice/dev.ini) and scripts to run the server and client side by side, with per-profile XDG directories for the client. Add a MySQL 8.4 compose stack published on loopback that loads the schema and an idempotent seed with accounts, roles, rooms, channels, reports, a warning, a ban, a deck, and chat log rows. Document both workflows in docs/DEVELOPMENT.md and link it from the README.
