Return recent regulatory enforcement actions from Magist’s catalog, optionally filtered by regulation id and a since-date. Each action includes the penalty, authority, a primary-source link, and (where authored) a practitionerAnalysis: a hedged, third-person editorial note on what the action illustrates, informational context that never addresses a specific product. penaltyAmount is null when no monetary amount is recorded (pending, confidential, annulled, or non-monetary outcomes; the amount string carries the honest description). Returns historical facts about what regulators have done: informational context, not a prediction about a specific product.