feat(auth): store machine identity auth as identity actor

[mathnogueira]

Context

Until now, all identity logins would be stored without an actor, which means that if you tried to investigate all actions from a machine using an identity, it would miss all the logins. Daniel had this issue in the past and requested that feature.

This would solve the issue without needing a query language as it unifies query in one single metadata (no need to check eventMetadata and actorMetadata)

Screenshots

Steps to verify the change

Type

• Fix
• Feature
• Improvement
• Breaking
• Docs
• Chore

Checklist

• Title follows the conventional commit format: type(scope): short description (scope is optional, e.g., fix: prevent crash on sync or fix(api): handle null response).
• Tested locally
• Updated docs (if needed)
• Updated CLAUDE.md files (if needed)
• Read the contributing guide

[claude]

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[maidul98]

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