- Documented the custom `.env` loader behavior, prioritization of OS-level environment variables, and validation stages.
- Explained server and client-specific configuration loading process.
- Added best practices for environment variable usage in development and production environments.
- Designed a stream/frame-based protocol leveraging `StreamOpen`, `StreamData`, and `StreamClose` fields for chunked transmission.
- Addressed DTLS/UDP MTU limits by capping tunneled body sizes to 48 KiB and replacing oversized responses with `502 Bad Gateway`.
- Updated `internal/protocol` to enable safe handling of large HTTP bodies via streaming.
- Documented future work on replacing JSON with binary encoding for improved performance.