Module set 

Unordered set operations stored under a key.

SetRef is a Redis-inspired set of members, encoded/decoded via the store Codec.

Features:

• membership: sadd, srem, sismember, scard, smembers
• sampling: srandmember, spop (best-effort pseudo-random; not crypto-secure)
• set algebra: sunion, sinter, sdiff + *store variants
• cursor scan: sscan (snapshot-based, deterministic paging)
• clear: sclear

Structs

SetRef

A Redis-inspired set reference.