Release v2026.9.1

🤖 AI-Generated Changelog

Fixed

• Fixed a crash in the pure-Python resolver backend when checking hashes for sdist packages
• Resolved incorrect resolver backend precedence when resolver_backend is set in [pipenv] configuration outside of a lock operation

Changed

• The resolver_backend setting in [pipenv] is now honored consistently outside of lock operations
• Improved resolver performance by memoizing pure-Python find_matches results during backtracking and caching parsed package manifests
• Both resolver backends are now benchmarked for better performance comparison and selection

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🔗 Full Changelog: v2026.9.0...v2026.9.1