Extracted duplicated target path resolution and allowlist validation logic
into a shared `resolveAndValidateTarget` helper function in
`src/services/governance/index.js`.
Updated `createProposal`, `validateProposal`, `applyProposal`, and
`rollbackPrompt` to use the new helper, ensuring consistent validation
and path handling across the service.
Added `test/governance-health.test.mjs` to verify validation logic.
Co-authored-by: PR0M3TH3AN <[email protected]>