List CMS nursing-home deficiencies

Per-citation CMS nursing-home deficiency list for a facility.

Each row is one Health Deficiency citation from CMS Care Compare -- survey date, deficiency tag (F-tag), the textual description, scope-severity letter (A-L), whether corrected, and the inspection cycle (standard survey vs complaint vs infection control).

Lookup: resolves cms_ccn from employer_profile. Only facilities with a populated CMS Certification Number have deficiency rosters. Other employers return 200 with empty results.

Severity coloring at the UI layer follows CMS conventions: A-C: isolated potential harm (mild) D-F: pattern potential harm (moderate) G-I: actual harm (high) J-L: immediate jeopardy (critical, burnt-umber)

Ordered most-recent-survey first, then severity within survey.