chore(v1.11.1.0): VERSION bump + CHANGELOG entry + TODOS follow-ups

Bumps from main's v1.11.0.0 to v1.11.1.0 (PATCH — bug-fix release, no new
user-facing artifacts). CHANGELOG entry covers the plan-mode handshake,
agent-sdk-runner canUseTool extension, and the 2 follow-up TODOs.

CHANGELOG order: v1.11.1.0 (this) → v1.11.0.0 (workspace-aware ship,
merged from main) → v1.10.1.0 (overlay efficacy harness). No duplicate
headers.

Syncs package.json version to match VERSION per the Step 12 idempotency
invariant (both files must agree or /ship halts).

TODOS.md:
- Preserves the Testing/security-bench-haiku-responses P1 added on main
- Adds P1 "Structural STOP-Ask forcing function" — broader class of the
  bug this release fixes
- Adds P2 "Apply interactive: true to non-review skills (office-hours,
  codex, investigate, qa, retro, cso)"

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

VERSION

@@ -1 +1 @@
-1.11.0.0
+1.11.1.0