Tests added: - log-service.test.ts: hierarchical logger creation and threshold propagation - logger.test.ts: threshold inheritance, message propagation, falsy threshold bug coverage (LogLevel.ALL = 0), deferred messages, Error handling - log-message.test.ts: parseLogLevel parsing, flattenMessage object/string modes - console-log-appender.test.ts: threshold, formatter, all-level routing - buffer-log-appender.test.ts: buffer append, threshold filtering, clearBuffer - api-log-appender.test.ts: configuration defaults, threshold, auth token Also fixes src/index.ts to export BufferLogAppender which was previously missing from the barrel export.
- Create test/ directory with a minimal LogService test - Prove out the pattern: bun test natively discovers and runs tests in the test/ directory using ESM-style imports from ../src/