LogParser: update types to eliminate the dreaded any, add Json type

[jaggederest]

This is generally fancier parameterized types than I normally use so would appreciate a close inspection on this one, thanks!

Relates to HDX-326

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[wrn14897]

This can be JSONBlob

[jaggederest]

Try it and see ;) It'll raise a circular definition error, at least when I did, it did.

[wrn14897]

Ah...good point. didn't notice the circular ref. its no big deal. but I'd use Record<string, Json> instead

[jaggederest]

Also circular, weirdly enough. It has to be a primitive literal in order to hit the circular reference type edge case.