* Add info and error logging
* Add tests for error logging
* Add logging for missing field
* Update docs for logging usage
* Fix style and pass by ref for string format args
* Make log_level explicit and simplify get log level from env
* Make log level int32_t
* Format enum class
* Fix ci
* Move enum to header
* Fix compilation for noexception build in test case
* Disable warnings and putenv
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Co-authored-by: Yong Xiang Ng <yxng@drwholdings.com>
Ng Yong Xiang