docs: DSFA Modul — MkDocs + Developer Portal Dokumentation

- docs-src/services/sdk-modules/dsfa.md: vollständige DSFA-Dokumentation
  (Endpoints, Datenmodell, Status-Workflow, DB-Tabellen, Tests, Compliance-Kontext)
- mkdocs.yml: DSFA in Navigation unter SDK Module eingefügt
- docs-src/index.md: DSFA + Paket-Links in Services-Dokumentation
- docs-src/services/sdk-modules/dokumentations-module.md: DSFA in Übersichtstabelle
- developer-portal/app/api/dsfa/page.tsx: vollständige API-Referenz mit cURL-Beispielen
- developer-portal/app/api/page.tsx: DSFA-Abschnitt mit allen 8 Endpoints

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

docs-src/index.md

@@ -142,6 +142,9 @@ Compliance-Services nutzen folgende Core-Infrastruktur:
 - [Document Crawler](services/document-crawler/index.md)
 - SDK-Module:
   - [Analyse-Module (Paket 2)](services/sdk-modules/analyse-module.md) — Requirements, Controls, Evidence, Risk Matrix, AI Act, Audit Checklist, Audit Report
+  - [Dokumentations-Module (Paket 3+)](services/sdk-modules/dokumentations-module.md) — VVT, Source Policy, Document Generator, Audit Checklist, Training Engine
+  - [DSFA (Art. 35 DSGVO)](services/sdk-modules/dsfa.md) — vollständig backend-persistent, Migration 024
+  - [Rechtliche Texte (Paket 4)](services/sdk-modules/rechtliche-texte.md) — Einwilligungen, Consent, Cookie Banner, Workflow
   - [Academy](services/sdk-modules/academy.md)
   - [Whistleblower](services/sdk-modules/whistleblower.md)
   - [Incidents](services/sdk-modules/incidents.md)