NPA-7129: add policy rule to list of allowed paths

[hatwell]

Pull Request

🧾 Ticket Link

https://nhsd-jira.digital.nhs.uk/browse/NPA-7219

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📄 Description/Summary of Changes

• Adds policy rule to the list of allowed paths for PATCH Consent

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🧪 Developer Testing Carried Out

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[github-actions]

This branch is work on a ticket in the NHS Digital NPA JIRA Project. Here's a handy link to the ticket:

NPA-7129

[Copilot]

Pull request overview

Updates the OpenAPI specification for the validated relationships service to allow patching an additional static JSON Patch path.

Changes:

• Added /policyRule to the list of allowed static PatchOperation.path enum values in the OpenAPI schema.

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