Capture client-sent Host/URI/headers/body before node HTTP rewrites are applied, so the recorder sees both the original and forwarded values. Adds a borrowBodyPrefix helper that inspects a body prefix without consuming the stream. Also serializes file recorder writes unconditionally (the underlying io.WriteCloser is not safe for concurrent Write) and drops a debug log from the bodyRegexp matcher.
- httpRecorder: use http.NewRequestWithContext instead of http.NewRequest
- tcpRecorder: loop Write to avoid short-write data loss
- fileRecorder: guard against nil out in Record and Close
- plugin/grpc, plugin/http: handle json.Marshal errors instead of ignoring
- fileRecorder, redis*Recorder: idempotent Close via sync.Once
- All exported symbols: add doc comments
ginuerzh