Why: Restore mergeability for PR #468 after main advanced; keep Documents pin that includes capacity report r2.1 (3cc6438). Evidence: documents contains 2026-10-12-u7-capacity-window-report.md. Impact: PR can merge onto current main. Refs: Dev #468; Documents #86/#87 Co-authored-by: Cursor <cursoragent@cursor.com>
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