v2.2.0

Fixed

• SSH Connection Leak (complete fix) — asyncssh.SSHClientConnection.is_closed is a method, not a property. Without (), the bound method reference was always truthy, so connections were never detected as closed. Every poll created a new SSH connection without closing the old one, leaking ~1 sshd process/minute on the ONU. Thanks to @markh0338 for identifying the root cause. (#2)

Added

• PON Alarms binary sensor — Real-time alarm detection (LOS, LODS, LOF) via pontop, with alarm types as state attributes
• GEM Downstream/Upstream sensors — Total fiber traffic counters (bytes) across all GEM ports via pontop
• GEM Key Errors sensor — Encryption key error counter across all GEM ports
• OLT Vendor sensor — ISP OLT equipment identification via OMCI ME 131
• CPU Load sensors — 1m, 5m, 15m load averages
• All new sensors are diagnostic entities

Changed

• Minimum asyncssh version bumped from >=2.14.0 to >=2.21.0