Module pool 

Thread pool management for ReifyDB.

Provides named, isolated thread pools for different workload classes:

• System pool: lightweight system actors (flow, CDC, watermark, metrics)
• Query pool: heavy query execution actors (WS, gRPC, HTTP)

Platform differences

• Native: each pool is a separate rayon::ThreadPool with its own OS threads
• DST/WASM: Pools is a zero-size marker (no real thread pools)

Structs

PoolConfig

Configuration for thread pool sizes.

Pools

Handle to the runtime’s thread pools.