chore: release v4.7.1

[wolverin0]

Summary

• bump package version to 4.7.1
• document fast natural-language recall and the operational acceptance gate
• document claim-intake protection for private topology and absolute local paths
• refresh deterministic release truth

Verification

• 103 focused release, retrieval, setup, supply-chain-contract, acceptance, and security tests passed
• Ruff passed
• wheel and sdist built successfully; Twine metadata checks passed
• no schema migration and no historical database mutation