feat(skills): add retrospective consistency check

[dollarop]

Resumen

• agrega un registro de comunicaciones a la plantilla de casos
• exige contrastar nuevos escritos con todo lo enviado anteriormente
• detecta hechos contradictorios, teorías descartadas y razonamientos autocontradictorios
• integra el control en argentina-bucles y argentina-diagnostico

Closes #22

Verificación

• git diff --check

[gitar-bot]

Code Review ✅ Approved

Adds a retrospective consistency check to case templates and diagnostic skills to prevent contradictory reasoning and discarded theories. No issues found.

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