T11 log — progress snapshot and chart catch-up

Timeline:

Start: readability_progress --check STALE (last row T5 at 240775039, HEAD 2992188ec); timeline --check fresh.
Snapshot-refusal cause: T5.c3 log:28 "readability snapshot refused (a stale census?)"; T5.md log:24 STALE census at .run/P39/census. grep type_census tools/restruct_cycle.sh → :66 census to default .run/P37/census; readability_progress.py:62-75 picks the newest .run/P/census (P39) and refuses on src stamp mismatch. Workaround: refresh P39 census before snapshot.
readability_progress.py:140-148: --check = last row commit == HEAD (strict).
Coder brief T11.c1 (opus55): progress.py README Types clause with live --check-casts --residue per-form raw + covered/uncovered, unbacked, lying; commit e7203a358b; log logs/T11.c1.md. Coder refreshed .run/P39/census and ran the gate (.run/logs/t11_cc.log): check-casts: raw P=257464 I=49831 X=13790 M=15128 (uncovered P=0 I=0 X=0 M=0); macros CAST_ALIAS=1173 CAST_SIGN=8429 CAST_WIDTH=10410 CAST_MISALIGNED=624 CAST_NONSTRUCT=327 (unbacked 0); lying=229 (ledgered 0).
Expert: readability_progress --snapshot 'P3.39 T11: chart catch-up' && timeline.py && progress.py --readme (.run/logs/t11_snap.log) rc 0.
Verify: readability_progress --check OK at e7203a358 == HEAD; timeline --check fresh (82 rows); progress --readme --check fresh.
Rejected: per-debt panels in story-timeline.svg (not cheap; deferred 3.40 per D1).
Observation: P37 vs P39 census differ by 6 P/M sites (336,213 vs 336,219); not investigated. Retrievers: none.