Module request 

Cacheable request types and traits.

This module provides types for determining whether requests should be cached and extracting cache keys from them:

• CacheableRequest - Trait for request types that can participate in caching
• CacheablePolicyData - Request bundled with its cache key
• RequestCachePolicy - Type alias for request cache decisions

Request Processing Flow

When a request is processed:

1. Predicates evaluate whether the request should be cached
2. Extractors generate the cache key from request components
3. The result is either Cacheable (with key) or NonCacheable

Structs

CacheablePolicyData

A cacheable request bundled with its generated cache key.

Traits

CacheableRequest

Trait for request types that can participate in caching.

Type Aliases

RequestCachePolicy

Cache policy for requests.