[ dergigi/boris ] docs: update CHANGELOG for v0.9.0

- Added user relay list integration (NIP-65) and blocked relays (NIP-51)

- Improved relay list loading performance with streaming callbacks

- Enhanced relay URL handling and normalization

- Fixed all linting issues and TypeScript type safety

- Added relay list debug capabilities

- Cleaned up temporary test relays and debug output

https://github.com/dergigi/boris/commit/556e8f2f7d354655e4cf3ae5feeafa2c1f67bb8d