Logger handler that captures raw log lines for traced requests.

While a process is executing a traced request, it carries the phoenix_gen_api_trace metadata (a list of {kind, key} targets) set by PhoenixGenApi.Tracer.begin_trace/1. Every Logger event emitted by such a process is forwarded to the PhoenixGenApi.Tracer writer, which appends it to the matching per-key trace files as an event=log line.

This handler is transparent: it forwards events to other handlers and does not modify or drop them.

This module also exposes the console_filter/2 used on the default console handler. When the tracer raises the primary log level to capture debug/info output for traced requests, that filter keeps untraced low-level messages from flooding the console.