Changelog

Polaris Market Data contract changes.

market_data.v1

Initial customer-facing market-data contract.

• Feeds: swaps, liquidity_book, quote_surface, depth.
• WebSocket and gRPC use aligned feed names.
• Liquidity book stream uses feed=liquidity_book.
• Breaking changes require a new major contract version.

The client workspace also maintains a CHANGELOG.md for package-level changes.