chore(nix): add flake.nix + bun.lock so 9router builds/deploys from this repo
Migrate the Nix build + deploy source from /home/code/9router-repo (a pure upstream mirror, now deleted) to this repo, which carries the MIBP fork merge (freebuff, cline free models, proxy-pool fitness). flake.lock and flake.nix copied verbatim from 9router-repo; bun.lock generated from the merged dependency set. The cron updater (9router-update.sh) now points at /home/code/9router with a keep-ours conflict policy.
This commit is contained in: