Logger parse level bug fix (TRACE or 3)

[AndreiRegiani]

Two bugs:

1. parse was missing to handle TRACE=3
2. fallback value was ERROR=1 instead of INFO=2, because the enum in parse function had the wrong count

Based on the --help

    --log-level <level>   Level to log at. 0,1,2,3 (OFF,ERR,INF,TRC)

• ./pear.dev sidecar --log-level 3 now works as expected

• improvements to known-nodes logging (dump entire array instead of " ... 11 more", more compact output)