Get populated clause payload (regulation-lens drill-down)
Returns clause metadata plus per-card counts + samples. Composite id format -. 404 on unknown clause; 403 when the clause’s regulation is not activated on the tenant. Samples match RecordedDecision shape.
Authorizations
MeshQu API key passed as a bearer token: Authorization: Bearer mqu_…. Mint one in the console (Settings → API keys).
Tenant UUID for multi-tenant isolation. Required on all authenticated routes — validated before authentication (middleware/tenant.ts), so a missing or non-UUID header returns 400 (MISSING_TENANT_ID / INVALID_TENANT_ID) before the API key is checked.
Path Parameters
Composite clause id in the form {regulation_code}-{clause_id}
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