dsh-config-origin-proof: DeepSeek Harness Configuration Source Ownership Proof

`dsh-config-origin-proof` is a DeepSeek Harness plugin designed to provide ownership verification for configuration origins through an evidence layer. It converts trusted records into reproducible receipts and supports DSH, CLI, and MCP modes. It reports only stable IDs, digests, and verdicts, rejects sensitive fields, and ensures the traceability and security of configuration decisions for auditing and preventing configuration injection attacks.