Module quote_source 

Quote source trait: Abstraction for quote data providers.

Implementations:

• MockQuoteSource: Manual injection for tests
• LiveQuoteSource: Wraps real exchange (future)
• CsvQuoteSource: Replay from CSV (future)

Structs

MockQuoteSource

Mock quote source for testing - allows manual quote injection.

Traits

QuoteSource

Trait for providing quote data.