List SEC enforcement actions

Get SEC enforcement actions filed against an employer's parent company.

Joined via employer_profile.parent_name → sec_enforcement_detail .parent_name. Returns empty results for non-public-parent employers (~99% of employers — most aren't SEC registrants).

Metered: one lookup per call. Same justification as get_inspections — un-metered would let a free-tier key scrape the entire SEC enforcement-history dataset for free by walking the sitemap.