feat: Capture EventName for logs

[brightsparc]

The otel logs schema was not writing the EventName if it was being passed, so added this to the schema, transformer.

[rjenkins]

Looks like it needs a cargo fmt.

[mheffner]

Hey @brightsparc! It looks like this column was added only recently to the schema in the CH exporter (open-telemetry/opentelemetry-collector-contrib#43164). It does not exist in the current schema here, so we'll need to perform some upgrades.

It appears that several other columns were added, so we'll need to identify an upgrade path. Obviously this could be a breaking change for existing users. The CH exporter appears to detect the active columns to identify which to send, so we may need to do something similar to avoid breakage.

So I think we'll need to look at this in the larger upgrade scope to bring the full schema up to sync and support users in hybrid status mode.