fix: Diagnostics channel Node v18

[timfish]

tracingChannel wasn't added until Node v18.19.0, v19.9.0 and we technically support v18.0.0.

[Copilot]

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[mydea]

just wondering, why is this different? 🤔 is it only being picked up at runtime this way, and thus does not break if that is not used? but either way, if it works...

[timfish]

only being picked up at runtime this way, and thus does not break if that is not used?

Yes this moves the error from import evaluation to runtime. This only impacts very new integrations so while they are not in the defaults this is not likely to break existing users. Allthough the new integrations won't support Node <= v18.18

I can make tracingChannel also return undefined and make all the integrations handle that too if you think it's worth it?

[mydea]

only being picked up at runtime this way, and thus does not break if that is not used?

Yes this moves the error from import evaluation to runtime. This only impacts very new integrations so while they are not in the defaults this is not likely to break existing users. Allthough the new integrations won't support Node <= v18.18

I can make tracingChannel also return undefined and make all the integrations handle that too if you think it's worth it?

I think it's fine as long as these are not default, which they will likely not be in node until v11, at which point this will be moot anyhow as we'll bump to node 20+ :)