Unify auth middleware and remove X-User-ID trust, add project_members
authorization, sandbox workspaces via resolver, and admin-only reconcile
by run_id. Introduce goose migrations with startup schema gate, fail closed
when DB unavailable outside explicit ALLOW_IN_MEMORY, bundle web/dist in
app Dockerfile, and remove frontend pseudo-login fallback.
Register uploads via CAS, resolve project asset pools into task materials
with server-side extraction, and propagate asset_id through the bizdev/squad chain.
Co-authored-by: Cursor <cursoragent@cursor.com>