fix: patch itservicehealth babel advisory

[saagpatel]

Summary

• pin transitive @babel/core to 7.29.6 with an npm override
• refresh the frontend package lock
• repair existing frontend lint baseline issues so dependency PRs can pass CI

Verification

• cd frontend && npm ci
• cd frontend && npm run lint
• cd frontend && npm run build
• cd frontend && npm audit --audit-level=moderate --json

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