v1.15.2 — Consolidation, DX and anti-collision patch

Consolidation, DX and anti-collision patch

Eight items from a June multi-model review cycle. Zero new capability — hygiene and defensive hardening only.

Fixed

• Same-second capture collision: chemin_png() now uses nanosecond resolution
  instead of second resolution. Two concurrent runs no longer risk overwriting each
  other's captures under /tmp/diwall/.
• Silent no-op on --auth-indicator-negative: passing this flag without
  --auth-indicator previously had no effect at all (the auth check block was
  skipped entirely). Now rejected early (exit 2) with an explicit message, before
  any browser is launched.

New

• scenarios/exemples/: three canonical, secret-free scenarios covering the
  fast probe pattern, Set-of-Mark navigation, and a secured RPA login pattern
  (vault-backed credentials, initial page assertion).

Documentation

• Exhaustive activation table for every conditional key in boussole.
• data-testid selector priority guidance.
• Perceptual fallback ladder (SoM → accessibility tree → visual click) for
  elements SoM cannot number.
• --stealth + --shadow-dom compatibility clarified.

Tests

• scenarios/v1.15.2_validation/: live proof that --no-evaluer blocks only
  scenario-level evaluer actions (not Diwall's own internal DOM calls), and
  that the auth negative assertion degrades correctly.