CohereFlux v0.7.1

This is a big release, with a re-architecture of the framework allowing query functions to have access to the whole entity from the upstream instead of having to rely solely on IDs

What's Changed

• The framework is now called CohereFlux, the whole API was modified to reflect that change
• Now passing entities T down the entire processing chain instead of ID
• Adding RuleMapperSource.call() to invoke a queryFunction with list of IDs instead of Collection of top level entities
• New BatchRule API
• Adding factory methods in CaffeineCacheFactory for max size and cache access expiry duration
• Replaced RC with Flux<R> in CohereFlux interface, type parameters are now CohereFlux<T, R>
• FetchFunction in CacheFactory now returns an empty Map when no RuleMapperSource is defined