docs: mark test plan implementation status
Commit
Soph2mo ago
Groups A/C/D/E/F(1,2,4,5)/G delivered on this branch; B-group blocked on decision D-1, F6 deferred, two pinned behaviors await product decisions.
Co-Authored-By: Claude Fable 5 noreply@anthropic.com Claude-Session: https://claude.ai/code/session_012yi3hHGAGepwfrfjPETjGq Entire-Checkpoint: 4f990d0112c0