add Anchor Bank demo runbook with scene-by-scene operator script

Delivers the A35-W3-Mon outline + A35-W4-Mon full script combined into a
single 898-line operator runbook for the 22-minute Anchor Bank demo
defined in docs/plan/bfsi-v1/02-bank-demo.md.

Twelve sections cover the entire room-time:

  1. Pre-demo setup checklist (T-24h) — equipment kit, network sanity,
     phone inventory, the seed-demo-tenants.ts live-key handling, dashboard
     and Basescan tab prep, dry-run, sleep.
  2. Day-of setup (T-30 min) — physical setup, browser/shell warm-up,
     phone setup, pre-checks.
  3. Opening 30-second pitch (verbatim from 02-bank-demo.md operator
     script).
  4-9. Scenes 1-6 — every keystroke, every sentence the operator speaks,
       what appears on the projector, what the CISO/CFO/CRO/CIO/GC each see.
       Scene 3 includes the substitution-attack demonstration. Scene 4
       includes the \\d users + SELECT * FROM users + DPDP 2(t) reading
       moment. Scene 5 includes the UPDATE audit_events tamper + on-chain
       anchor cross-check.
  10. Q&A bank — 13 questions sourced from 02-bank-demo.md with prepared
      2-3 sentence operator answers.
  11. Recovery playbook 11a-11f — kiosk freeze, app crash, network drop,
      tier-2 device (no StrongBox), R307 missing, proof verification
      rejection (the worst nightmare). Each has a calm-recovery script.
  12. Post-demo (T+10 min) — leave-behind folder contents, the 90-second
      ask, follow-up cadence (T+0 through T+42), debrief, photo policy,
      cleanup.

Two appendices: operator wallet-card contact list + timing reference.

References docs/plan/bfsi-v1/02-bank-demo.md as the canonical demo spec,
docs/plan/bfsi-v1/01-pain-points.md for the P1-P10 cross-references, and
scripts/seed-demo-tenants.ts for the exact tenant + API-key format.

Owner: Agent #35 (writer-compliance) + Agent #45 (solutions architect).

[no-test] markdown-only.

Author: pulkitpareek18