docs: add CASTÚO promotion closure plan and claim boundary

[Traky12]

Purpose

Integrate the CASTÚO promotion-closure plan and explicit claim boundary.

Evidence posture

This change preserves PROMOTION = BLOCK / LOCAL_RESULT_NO_CLAIM until S-001A, portable evidence, independent replay, review and rollback are closed.

Scope

Documentation only: no production claims, secrets, or irreversible runtime changes.

[github-actions]

🚦 48h Operativity: UNKNOWN

• TRL9 Gate: UNKNOWN
• Workflow result: failure
• Report file: not-generated
• Gate source: artifacts/operativity/trl9/go-nogo-status.md

[github-actions]

🔍 Resumen de checks del PR #19

Workflow: Validate All
Conclusión: failure
Run: https://github.com/Traky12/Cast-o/actions/runs/32214544151

• ✅ Pasados: 12
• ❌ Fallidos: 6
• ⏭️ Omitidos/Neutral: 3

Detalle de checks

• Checklist Sabionda: failure (https://github.com/Traky12/Cast-o/actions/runs/32214544155/job/95953582190)
• notify-failure: success (https://github.com/Traky12/Cast-o/actions/runs/32214544151/job/95953574748)
• Trivy: success (https://github.com/Traky12/Cast-o/runs/95953549997)
• Prueba de caos (drift simulation): success (https://github.com/Traky12/Cast-o/actions/runs/32214544155/job/95953545051)
• Exportar metricas de sincronizacion: success (https://github.com/Traky12/Cast-o/actions/runs/32214544155/job/95953518292)
• k8s-validate: skipped (https://github.com/Traky12/Cast-o/actions/runs/32214544118/job/95953518166)
• Notify SABIONDA Core: skipped (https://github.com/Traky12/Cast-o/actions/runs/32214544126/job/95953517381)
• Register Push in GaiaChain: skipped (https://github.com/Traky12/Cast-o/actions/runs/32214544126/job/95953508248)
• reconcile: failure (https://github.com/Traky12/Cast-o/actions/runs/32214544148/job/95953485642)
• validate-tests: failure (https://github.com/Traky12/Cast-o/actions/runs/32214544151/job/95953485602)
• validate-security: success (https://github.com/Traky12/Cast-o/actions/runs/32214544151/job/95953485577)
• validate-docs: success (https://github.com/Traky12/Cast-o/actions/runs/32214544151/job/95953485564)
• operativity-check: failure (https://github.com/Traky12/Cast-o/actions/runs/32214544144/job/95953485517)
• test-js: success (https://github.com/Traky12/Cast-o/actions/runs/32214544160/job/95953485397)
• timescaledb-ha: success (https://github.com/Traky12/Cast-o/actions/runs/32214544187/job/95953485396)
• test: failure (https://github.com/Traky12/Cast-o/actions/runs/32214544118/job/95953484250)
• Preflight de robustez: success (https://github.com/Traky12/Cast-o/actions/runs/32214544155/job/95953484220)
• validate-pr: in_progress (https://github.com/Traky12/Cast-o/actions/runs/32214544129/job/95953484157)
• validate-vault-pattern: success (https://github.com/Traky12/Cast-o/actions/runs/32214544131/job/95953484091)
• build-linux: failure (https://github.com/Traky12/Cast-o/actions/runs/32214544123/job/95953484034)

[github-actions]

🚨 Fallo en workflow

• Workflow: Validate All
• Conclusión: failure
• Run: https://github.com/Traky12/Cast-o/actions/runs/32214544151

[github-actions]

🔍 Resumen de checks del PR #19

Workflow: E2E - Pull Request to Main
Conclusión: success
Run: https://github.com/Traky12/Cast-o/actions/runs/32214544129

• ✅ Pasados: 13
• ❌ Fallidos: 6
• ⏭️ Omitidos/Neutral: 3

Detalle de checks

• Checklist Sabionda: failure (https://github.com/Traky12/Cast-o/actions/runs/32214544155/job/95953582190)
• notify-failure: success (https://github.com/Traky12/Cast-o/actions/runs/32214544151/job/95953574748)
• Trivy: success (https://github.com/Traky12/Cast-o/runs/95953549997)
• Prueba de caos (drift simulation): success (https://github.com/Traky12/Cast-o/actions/runs/32214544155/job/95953545051)
• Exportar metricas de sincronizacion: success (https://github.com/Traky12/Cast-o/actions/runs/32214544155/job/95953518292)
• k8s-validate: skipped (https://github.com/Traky12/Cast-o/actions/runs/32214544118/job/95953518166)
• Notify SABIONDA Core: skipped (https://github.com/Traky12/Cast-o/actions/runs/32214544126/job/95953517381)
• Register Push in GaiaChain: skipped (https://github.com/Traky12/Cast-o/actions/runs/32214544126/job/95953508248)
• reconcile: failure (https://github.com/Traky12/Cast-o/actions/runs/32214544148/job/95953485642)
• validate-tests: failure (https://github.com/Traky12/Cast-o/actions/runs/32214544151/job/95953485602)
• validate-security: success (https://github.com/Traky12/Cast-o/actions/runs/32214544151/job/95953485577)
• validate-docs: success (https://github.com/Traky12/Cast-o/actions/runs/32214544151/job/95953485564)
• operativity-check: failure (https://github.com/Traky12/Cast-o/actions/runs/32214544144/job/95953485517)
• test-js: success (https://github.com/Traky12/Cast-o/actions/runs/32214544160/job/95953485397)
• timescaledb-ha: success (https://github.com/Traky12/Cast-o/actions/runs/32214544187/job/95953485396)
• test: failure (https://github.com/Traky12/Cast-o/actions/runs/32214544118/job/95953484250)
• Preflight de robustez: success (https://github.com/Traky12/Cast-o/actions/runs/32214544155/job/95953484220)
• validate-pr: success (https://github.com/Traky12/Cast-o/actions/runs/32214544129/job/95953484157)
• validate-vault-pattern: success (https://github.com/Traky12/Cast-o/actions/runs/32214544131/job/95953484091)
• build-linux: failure (https://github.com/Traky12/Cast-o/actions/runs/32214544123/job/95953484034)