GEN Proof of Genesis API
Back up GEN assets to Walrus with verifiable hashes. Base URL `https://agent-core.gen.pro/v1`. Public assets may be uploaded raw; private assets must be encrypted before upload because Walrus blobs are public by default. Default automatic sources are downloaded and published assets; generated/uploaded sources are supported for opt-in or manual flows. Storage is monthly: Agent Core writes Walrus blobs for two epochs (~28 days), charges Rails operation `backup_to_blockchain` in GB-month units after upload/readback verification, and marks renewal due three days before expiry.