Task 3's contract contribution legitimately registered a TECH_LOG_STUDIO_SESSION
auth profile, growing INSTALLED_REST_AUTH_PROFILES from 2 to 3 entries. The
exact-key-set regression test at contract-registry-immutability.test.ts:91
correctly caught the drift; test:unit was left off Task 3's verification list,
so it went unnoticed until Task 5 ran the full suite. Updates the expected key
list rather than weakening the assertion, so it keeps forcing a reviewer to
confirm any future registry change was intended.
DongHyeonka
7724a8720c