v7.1.1

Fresh installs of v7.1.0 deployed only Investigation + Executives
even with demo apply --all + deploy --all. Root cause: the
DEMO_APP_CHOICE Click choice list still listed only
{investigation, executives} (M.2.2 era when L1 + L2FT were
prototyped through a separate L2 pipeline), and the
_apply_demo() body had no codegen branches for L1 / L2FT. So
demo apply --all silently skipped two of four apps; deploy --all then shipped what JSON existed in out/.

Fix: extend DEMO_APP_CHOICE to list all four apps, and add the
matching _generate_l1_dashboard / _generate_l2_flow_tracing
calls to _apply_demo(). Verified end-to-end: demo apply --all
now writes 4 analyses + 4 dashboards + 35 datasets +
datasource.json + theme.json. No other behavior change; existing
dev-loop deploys (deploy --all --generate) were not affected
because the standalone generate --all already handled all four
apps correctly — only demo apply was the gap.