Refresh Anthropic cloud storage OA date

[tomtoto757]

Summary

• Refresh the existing Anthropic Cloud Storage System row from Jul 08, 2026 to the latest verified FastPrep sighting, 🔥 Aug 22, 2026.
• Re-run the repository freshness script so the complete README remains date-sorted and marker-correct.
• Keep the Stage 4 scope limited to the owned README.md file.

Verification

• python3 scripts/refresh-freshness.py — second run was idempotent with 0 marker changes and 0 reorderings.
• python3 -m unittest scripts/test_sync_practice_formats.py — 10 of 10 passed.
• Canonical table audit — 1,986 rows, unique FastPrep routes, two matching URLs per row, canonical six-pipe formatting.
• Target audit — exactly one anthropic-cloud-storage-system row with company Anthropic, format Coding, and 🔥 Aug 22, 2026.
• git diff --check origin/master...HEAD — passed.

Independent regression review

• Reviewer: independent subagent final_regression_review.
• Reviewed SHA: 69548ed46b00197d9113b8f84eef9236f88ea28f.
• Target base: 3c98ad57c68670b3cfb001a50c7818d470548683.
• Scope: complete README diff, target route/date uniqueness, current FastPrep latest date, all-row formatting and ordering, freshness idempotence, duplicate routes, company-list uniqueness, and generated-format consistency.
• Finding: python3 scripts/sync-practice-formats.py --check reports stale generated format pages. The target row in formats/coding.md still shows Jul 08, 2026 while the Stage 4 owned README now shows Aug 22, 2026.
• Resolution: this PR remains draft because Stage 4 permits only README.md; no generated page was edited outside that ownership boundary.

Merge exit criteria

Run the repository-defined generated-format synchronization so formats/coding.md reflects the updated target row and python3 scripts/sync-practice-formats.py --check passes, or obtain an explicit maintainer decision that the hourly synchronization will supply that generated update after merge.