docs: sync README and deployment guide with codebase state (#83)
README was missing 3 of 5 packages (atproto, cli, logger).
Deployment guide had SESSION_TTL_DAYS default wrong (30 vs actual 7)
and was missing LOG_LEVEL, SEED_DEFAULT_ROLES, DEFAULT_MEMBER_ROLE
from the optional env vars table. Production env example was missing
FORUM_HANDLE and FORUM_PASSWORD variables.