compliance-aggregator: add a get_checks_summary view returning which of the two check kinds are configured

[Idaonoli]

Scope

denylist_gate()/jurisdiction_flag() each return an Option<Address> individually. A single call returning both configured/unconfigured states together would save an off-chain caller two round trips when just checking "what's configured" (e.g. for a dashboard) rather than needing either address value.

Acceptance criteria

• Add get_checks_summary(env) -> (bool, bool) (or a small struct) indicating whether the denylist-gate and jurisdiction-flag checks are configured, without requiring two separate calls