Mark a Helium Release Proposal as deployed. Updates the HRP status to Released and records the deployment date. Use when the user says "the release is deployed", "mark it as released", "it's live", "we shipped the release", "deployment is done", or wants to close out an approved HRP after the network deployment. Also handles no-change months where no vote was needed — use when the user says "no changes this month", "skip this release", or "nothing to deploy".