docs: audit du temps verbal "legacy" dans la doc active

chore(versioning): reposition project as 0.9.0 (pre-1.0)

docs: zero out narrative debt (Phase 2 L4)

docs(root): move ACCESSIBILITY and SPECS out of root to their proper sections

docs(archive): consolidate audits, migration, pre-v2 roadmap under docs/archive/

docs(sprint-H.9): archive migration plans + cleanup stale doc paths

feat(sprint-H.3)!: renommage reports_v2/ → reports/

docs: nettoyage architecture 3-cercles → 8-couches dans tous les docs

docs: refonte Diataxis + 8 documents institutionnels (S60)

docs(s2): Sprint A14-S2 — recadrer le discours, garde-fou install minimal

fix(zero-debt): éliminer toute la dette technique actionnable identifiée

fix(ci): pre-commit hooks + pip-audit (security scanner)

docs: plan d'évolution Picarones 2026 (axes A et B unifiés)