EVO-67: add 'No especificado' opt-out value to sexo/sexoPaciente lookup group

Elazar GO 2026-07-19 (via pmmaster EVO-67). Field STAYS required (visual-cue-not-relax principle holds) — add a legitimate opt-out VALUE, not a relax-to-optional. db-venus-cc: add ONE lookupOptions row in venus's sexo group (confirm exact group name — pmmaster states pluto/venus use 'sexoPaciente', mars uses 'sexo' — verify against live schema before writing), value=noEspecificado, label 'No especificado', activo=true. coder-venus-cc: form keeps required=true; 'No especificado' is a valid selection alongside existing options — no UI relaxation. Class-S (no schema/auth/email path — pure lookup row + no validation-logic change). Reply SHA to pmmaster on push per PTD.