Integrate the French HR compliance matrix

Adds matrice-conformite-rh-france-2026.md to the repo and rewrites
section 12 around it. Also fixes the link in Audit Combo/INDEX.md,
which pointed one level above the repo root.

The matrix changes the design in four places:

- Time has three states, not two. Planned, actual and paid must be
  distinguishable, and payment may never be made conditional on a
  manager's validation, nor may an authorisation workflow delete
  hours actually worked.
- The rule engine must be effective-dated, not merely versioned: a
  prior payroll has to replay identically after a rule change.
- Retention is per object with a documented start point and
  justification, explicitly not "5 years everywhere". Adds
  RetentionPolicy and the duration table.
- Control features need a server-side gate that stays closed until
  the employee notice and the CSE opinion are recorded. FeatureFlag
  carries those fields.

Adds paid-leave accrual, the 15-month carry-over, and the
obligation to inform an employee of their rights within a month of
returning from sick leave.

Scopes out payslips, DSN and geolocation, and flags on-call duty and
forfait jours as open questions. Notes that the matrix covers adult
employees only, so the MINOR_* rules remain unsourced and are now a
stop signal.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Cr9dkEHwbDgkWPnyGj1Rjv

Audit Combo/INDEX.md

@@ -8,7 +8,7 @@ Pages capturées : **58**
 - [Cartographie fonctionnelle et technique](FUNCTIONAL_MAP.md)
 - [Inventaire structuré du crawl](inventory.json)
 - [Chemins applicatifs extraits des bundles](bundle-paths.txt)
-- [Matrice de conformité juridique française](../../matrice-conformite-rh-france-2026.md)
+- [Matrice de conformité juridique française](../matrice-conformite-rh-france-2026.md)
 
 
 | Route | Titre | Capture |