send log bridge data over logs stream

[davidhewitt]

Followup to #73 - I realised that this also needs to apply to the bridge from the log crate.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 97.88446% with 26 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
src/internal/logfire_tracer.rs	77.45%	17 Missing and 6 partials ⚠️
src/bridges/log.rs	99.82%	0 Missing and 2 partials ⚠️
src/internal/exporters/console.rs	50.00%	0 Missing and 1 partial ⚠️

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