feat(prefix-diff): full cache-key attribution — marker windows, tail snapshots, per-tenant baselines#280

Gunther-Schulz wants to merge 2 commits into

cnighswonger:maincnighswonger/claude-code-cache-fix:mainfrom

Gunther-Schulz:pr/prefix-diff-attributionGunther-Schulz/claude-code-cache-fix:pr/prefix-diff-attributionCopy head branch name to clipboard