Fix resume state lookup for workflow key variants

[brownetw-ai]

Summary

• Allow Lobster workflow resume to load state keys that use either workflow_resume_ or workflow-resume_ prefix.
• Fixes approval resume failures when token key uses hyphen variant.

Context

Observed resume tokens containing workflow-resume_… while state files were saved as workflow_resume_…, leading to Workflow resume state not found.

Changes

• Fallback lookup in loadWorkflowResumeState to try both key prefixes.

Testing

• Reproduced failure locally; approvals failed until this patch.
• After patch, approvals succeed and remediation completes.