33fcedefc7
Per plan Task 7.2: marked the 'Public API deprecation' section as RESOLVED 2026-06-15. The section now describes the canonical public API (send_result()) and points to the public_api_migration_and_ui_polish_20260615 track as the source of the migration. Verification: rg -i 'send.*deprecat|deprecat.*send' conductor/product-guidelines.md returns 0 hits.