chore(memory): correct BLK-022 — gitflow-test.sh is flaky, the before/after was noise

I recorded "92/14 on pristine develop vs 93/13 after — nothing worsened, one
case better". Three consecutive runs on one unchanged tree give 90/16, 92/14,
92/14: the suite is non-deterministic and both figures were single samples of
that spread. The port is indistinguishable from the noise; claiming an
improvement was false precision.

Surfaced because the post-merge run reported 90/16 and looked like a
regression. It was not — but the only reason the question could be settled
was re-running, which is exactly what the original claim had skipped.

.claude/tasks/TODO.md

@@ -1296,8 +1296,10 @@ Oracle = `make test` du repo: chaque défaut est apparu comme une assertion nomm
       Playwright 1.63.0 réappliqué en local ([[BDR-029]]). `chromium.launch()` OK (Chrome 153).
 - [x] T7 capitalisation — BLK-021/022, LRN-150/151, BDR-088, EVAL-029, journal, index à jour.
 - [ ] MERGE — les 5 branches attendent le gate humain gitflow. Rien n'est poussé.
-- [ ] OUVERT — `gitflow-test.sh` 13 échecs PRÉEXISTANTS et non attribués
-      (92/14 sur develop vierge vs 93/13 après). Chantier distinct, pas un reliquat.
+- [ ] OUVERT — `gitflow-test.sh` échoue de façon INSTABLE: 90/16, 92/14, 92/14 sur
+      trois runs d'un arbre identique. Échecs préexistants, non attribués, et ce
+      portage est indiscernable de ce bruit. Chantier distinct. Corollaire: toute
+      comparaison avant/après sur cette suite exige plusieurs runs, pas un échantillon.
 - [ ] OUVERT — gitleaks absent de la machine, non fourni par l'installeur →
       T16a et `make scan-secrets` indisponibles.
 - [ ] OUVERT — dérive d'index préexistante: blockers BLK-018..020 et learnings