v0.6.0-beta.3

Fixed

• 📈 Throughput Sensor Negative Values on Switch Reboot: Resolved an issue where 64-bit High Capacity (HC) counters yielded negative throughput rates following a switch reboot or counter reset. The bandwidth polling loop now gracefully returns None for rates when a negative delta is detected and updates the baseline, allowing positive rate calculations to resume cleanly on the very next poll.
• ⚡ SNMP Polling Error Isolation: Isolated optional secondary polling features (PoE and environmental/hardware metrics) inside try...except blocks. If any sub-poll times out or fails (highly common on sluggish switches under load), it will no longer crash the entire coordinator update cycle, preventing switch interface entities and attributes from freezing with stale timestamps.