chore: public-readiness cleanup

- Remove default Grafana password (fail loudly if unset)
- Clean up stale delivery-proof TODO (already implemented at RPC layer)
- Document TUI send as local-only, point to REPL for E2E delivery
- Gitignore AI workflow files (CLAUDE.md, master-prompt.md, ai_team.py)
- Remove 5 orphaned v1 crates (bot, ffi, gen, gui, mobile)
- Commit ROADMAP.html updates

.gitignore

@@ -20,3 +20,8 @@ qpq-server.toml
 
 # Internal planning docs (not for public distribution)
 docs/internal/
+
+# AI development workflow files
+CLAUDE.md
+master-prompt.md
+scripts/ai_team.py