chore(main): release 6.0.0

[github-actions]

🤖 I have created a release beep boop

5.1.0 (2026-06-25)

⚠ BREAKING CHANGES

• iam/agent: the IRSA token no longer has Route53/EKS/ELB/AVP permissions directly. The agent must assume the permissions role (exposed via the nullplatform_agent_permissions_role_arn output) to use them.

Features

• iam/agent: split agent role into agent + permissions roles (#397) (9df28f5)

Miscellaneous Chores

• release 5.1.0 (#410) (fc5ef69)

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[davidf-null]

Cerrado a propósito: el cálculo dio 6.0.0 por el footer BREAKING CHANGE de #397, pero se decidió tratarlo como minor. El PR #410 fuerza Release-As: 5.1.0; al mergearlo, release-please reabrirá un PR de release nuevo ya en 5.1.0.