xfy c157be1ce5 refactor(cache): remove unused disk/tiered cache and add helper functions
Remove unused disk cache, tiered cache, purge, and config loader code.
Add HashPathWithMethod and MatchPattern helpers for future cache purge API.
Update test to use new mock backend API with ResponseBody field.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
2026-05-09 17:26:19 +08:00
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