- Add Channels.match(name, ch) for dual-mode event filtering
Returns true if ch matches any active channel for the logical name.
In dual mode, matches both legacy and target channels.
- Switch default channelMode from 'current' to 'target'
RT channels now resolve to 4210-4213 instead of legacy 100-103.
- Config default also updated so fresh installs start in target mode.
- Rollback to 'current' mode still supported via setMode().
