feat(docs): add detailed features and business flow diagrams

- Introduced new interaction and community features, including comments and private messaging.
- Added technical diagrams for critical workflows: authentication, content publication, and messaging.
- Enhanced data model documentation with support for comments and messaging tables.
- Updated API references with endpoints for comments, messaging, and user search.
- Integrated post-quantum cryptography for improved data protection.

documentation/content/docs/index.mdx

@@ -18,10 +18,11 @@ graph TD
     User([Utilisateur])
     Caddy[Reverse Proxy: Caddy]
     Frontend[Frontend: Next.js]
-    Backend[Backend: NestJS]
+    Backend[Backend: NestJS 11]
     DB[(Database: PostgreSQL)]
     Storage[Storage: S3/MinIO]
     Cache[(Cache: Redis)]
+    AV[Antivirus: ClamAV]
     Monitoring[Monitoring: Sentry]
 
     User <--> Caddy
@@ -30,6 +31,7 @@ graph TD
     Backend <--> DB
     Backend <--> Storage
     Backend <--> Cache
+    Backend <--> AV
     Backend --> Monitoring
 ```
 
@@ -43,6 +45,11 @@ Explorez les sections clés pour approfondir vos connaissances techniques :
     href="/docs/features"
     description="Détails des capacités techniques et du pipeline média haute performance."
   />
+  <Card
+    title="🔄 Flux Métiers"
+    href="/docs/flows"
+    description="Diagrammes de séquence des processus critiques (Publication, 2FA, Chat)."
+  />
   <Card
     title="🔐 Sécurité"
     href="/docs/security"