- RBAC: Viewer role changed from prefix "system." to explicit allowlist
of safe read-only methods. Prevents Viewer access to system.factory-reset,
system.shutdown, system.reboot, system.disk-cleanup.
- identity.create: Name/label param now enforces max 100 chars.
- sanitize_error_message: Changed from contains() to starts_with() for
prefix matching, preventing internal errors that happen to contain
user-facing keywords from leaking through.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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