Implement in-memory order history caching with sliding expiration

[mx57]

Implement OrderCacheProcessor in IntelliTrader.Trading/Processors to optimize historical trade order loading using a thread-safe sliding cache with configurable expiration times (TTL). Include comprehensive unit tests verifying sliding cache hits, expiration refetching, try-get methods, and manual invalidation. Update task manifest status for trading-order-history-cache.

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PR created automatically by Jules for task 13881325129928742898 started by @mx57

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