Function resolve 

pub fn resolve(
    store: &dyn CardStore,
    spec: CardContextSpec,
) -> Result<Vec<Value>, String>

Resolve a CardContextSpec against store, returning full Card JSON documents.

• CardContextSpec::CardId → 1-element Vec<Json> on hit, empty Vec<Json> on miss (miss is Ok, not Err).
• CardContextSpec::Query → up to limit Card JSON values ordered by created_at descending; empty result set is Ok.

The query form loads full TOML for each hit via a second get_with_store call (N+1 fetch). With the MVP default limit = 5 this is well within I/O budget; if a future phase needs to raise the limit substantially we can add a find_full_with_store batching API.