Resolved FeatureCatalog; telemetry now reads the taper count from the
inventory feature. The logoff inventory is sent from the feature's own
OnLogoff instead of a second host-logoff subscription whose correctness
depended on subscription order: the root logs features off in reverse, the
socket last, so the frame still leaves.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>