Adds 21 new data types from unifi v5.26.0 across all metric output plugins
(InfluxDB, Prometheus, DataDog). Per-site Integration/v1 calls are gated on
API key configuration and only run for user-configured sites; ErrEndpointNotFound
is handled gracefully so older firmware continues to work without log spam.
Also migrates events collection (collectAlarms, collectAnomalies, collectEvents,
collectIDs, collectProtectLogs) to handle Network 10.x+ endpoint removals via
ErrEndpointNotFound, with debug-level logging to avoid per-poll noise.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>