- waitForLogEntry raced winston's async flush and JSON.parsed a
partially written line, failing the error-serialization tests on
loaded CI runners; unparseable lines now wait for the next poll.
- Corrected TTY property restoration to properly delete injected properties instead of redefining them as truthy values.
- Updated environment restoration to modify process.env keys individually to prevent breaking environment object reference bindings.
- Prevented pollution of TTY-gated code and environment variable state across test suites.
- Added a custom JSON replacer that unwraps `Error` instances in logger output, preserving name, message, stack, cause, and enumerable fields.
- Updated uncaught-exception and unhandled-rejection logging paths to pass only `{ err }`, relying on the logger serializer for full error details.
- Extended transient socket-close matching to detect HTTP2 stream reset/refused/calm errors and added regression tests for logger error serialization behavior.
can1357