`cloakbrowser info` printed a bare seat count with no denominator, so a
customer could not tell whether they were at capacity (#513). It also
collapsed six distinct outcomes into one "unavailable": unreachable,
timeout, invalid key, inactive licence, rate limited, and the server
reporting the count as unknown while degraded.
Adds SessionSeats (active, limit, state, reason) and getSessionSeats to
all three wrappers; get_active_session_count keeps its signature and
delegates. The limit is read from the server, never derived from the plan
name, and falls back to the old bare count when absent.
Python, JS and .NET renderers verified byte-identical.
CloakHQ
c2421da06d