64b4aa1ae0
- Replaced `op: pr_diff` with `pr://<N>/diff` URL variants and routed PR diffs through URL parsing. - Added `readArgsHaveTarget` checks to gate read-call tracking on `path`/`file_path` targets. - Added auth-key-aware GitHub caching with scoped rows, default auth resolution, and hard-TTL invalidation. - Added markdown output rendering for read with markdown-cell layout, ANSI-aware truncation, and expand-width cache reuse. - Updated PR diff and cache tests, replacing deprecated `pr_diff` cases with `/diff` and auth/TLL coverage.