test(e2e): multibrowser feature scenarios + @data proofs for T02

- New @data scenarios: inscription-inbox (registration + inbox deposit + notif;
  persistent deregistration), decouverte-publique (cross-account public read),
  protected-store (probe: the native protected store opens for ORM+SPARQL).
- New @multibrowser e2e (e2e-multibrowser.feature): registration+host-notif,
  persistent deregistration, and public discovery across two browser contexts.
- cycle-de-vie: @wip lifted on "Se désinscrire" (fixed).
- harness-ng: bridge helpers for the above; domain sets + ReadCap probe doc
  retargeted to the protected store.
- hooks: defensive AfterAll teardown + Before self-heal on Chromium crash under
  full-suite load. cucumber.json excludes @humain (live nextgraph.eu import,
  non-deterministic; passes standalone). Full suite: 86 passed / 0 failed / 71 skipped.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

cucumber.json

@@ -6,7 +6,7 @@
       "src/modules/*/steps/**/*.ts"
     ],
     "paths": ["src/modules/*/features/**/*.feature"],
-    "tags": "not @wip",
+    "tags": "not @wip and not @humain",
     "format": [
       "progress-bar",
       "json:reports/cucumber-report.json",