pub fn init() -> Result<(), ServerError>Expand description
Initialize the process-global tracing subscriber for production server
output, and bridge the log facade into it.
Events are written as JSON to stdout. AION_LOG takes precedence over
RUST_LOG, and the subscriber falls back to info when neither is set.
§Errors
Returns ServerError when the configured filter directive is invalid,
when another log logger has already been installed, or when another
tracing subscriber has already been installed. Both collisions are real
double-initialization bugs — a process with two loggers has already lost
half its diagnostics — so they are propagated, never swallowed.