Clears two dependabot alerts on the test harness's ws dependency:
GHSA-96hv-2xvq-fx4p (high, memory-exhaustion DoS, fixed 8.21.0) and
GHSA-58qx-3vcg-4xpx (medium, uninitialized memory disclosure, fixed
8.20.1). Test-only — the shipped brainstorm server hand-rolls its
WebSocket framing and does not depend on ws. Suite passes (57/57).
WebSocket server for real-time browser communication during brainstorming
sessions. Includes browser helper library for event capture, shell scripts
for server lifecycle management with session isolation and persistent
mockup storage, and integration tests.
Co-Authored-By: Drew Ritter <drew@ritter.dev>
