v0.9.0

• New Lazy message construction — pass () => 'expensive $message' to any log method.
  The lambda is only called when the log level passes the filter, avoiding unnecessary string allocations.

• New Lazy log builders — traceLazy, debugLazy, infoLazy, noticeLazy, successLazy, warningLazy, errorLazy, criticalLazy, wtfLazy, and logLazy (with a level: argument) — defer the entire log call (message, data, error, stackTrace, formatOptions) until the level filter passes.
  Useful when expensive work lives in the structured data map, not just the message string.

  Chirp.warningLazy(
    (log) => log('snapshot', data: {'state': renderState()}),
  );

  Matching Chirp.*Lazy static forwarders are exposed on the global logger.
  Caller resolution lands on the xxxLazy(...) invocation line, not the inner (log) => ... lambda body, so eager and lazy calls report consistent source locations.
  Adds the ChirpLogFn typedef for the inner log callback.