docs + audit sweep 2026-07-23: fill-model lesson, five-test day, archive pass

FINDINGS: 'The fill model is the next scorer' section (A2 chain grade
-$7.54/fill x1344 confirms the surge kill; oracle harness chain grade
vetoes the ledger-positive tiers; virtual-book +26% variance footnote;
the five tandem tests and the makers-on-the-wall through-line).
HANDOFF: snapshot -> 07-23 (7-wallet rev 5, dark flags, Friday agenda
incl #20/#21). READMEs: /test consolidation row, measurement-harness
research row, study statuses + new script inventory.
Archive: value/ (closed 07-19) + its test, ETHERSCAN_MIGRATION.md,
order_probe v1 -> archive/; replay_out/ gitignored; links repaired.
Tests: all 7 active scripts pass post-move.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

HANDOFF_ARCHIVE.md

@@ -365,7 +365,7 @@ reviewing the fix. Recommended: re-run a probe on an IN-PLAY market first.**
 
 Self-contained pickup for a fresh session (human or AI). Read
 [README.md](README.md) gotchas 1–16 (16 is the new-stack one), 
-[FINDINGS.md](FINDINGS.md), [ETHERSCAN_MIGRATION.md](ETHERSCAN_MIGRATION.md),
+[FINDINGS.md](FINDINGS.md), [archive/ETHERSCAN_MIGRATION.md](archive/ETHERSCAN_MIGRATION.md),
 [LIVE_ROLLOUT.md](LIVE_ROLLOUT.md). The repo is authoritative.
 
 ## THE CRITICAL PATH IS DONE (2026-07-10 05:08Z)
@@ -474,7 +474,7 @@ that; the 5-min backstop poll covers detection meanwhile).
 
 ## Queued work (unchanged priorities)
 
-1. ETHERSCAN_MIGRATION.md phases 0→5.
+1. archive/ETHERSCAN_MIGRATION.md phases 0→5.
 2. Empirical fill model from `book` snapshots; depth gate before sizing up.
 3. Funding-cluster tracer port to Etherscan logs.
 4. Live-app watchdog (poll mode has no /health).