[stlava]

I run a fairly high scale pipeline on lambda. The post touched briefly on logging but wanted to chime in with a few helpful points:

- Format all logs in json. This allows you to use the json path filtering option on CW.

- Add function version & tag to the log lines. CW doesn't allow you to filter based on version.

- Don't expect CW log querying to work all the time.

- Output runtime stats to CW metrics.

edit: formatting