feat: Implement Compliance Academy E-Learning module (Phases 1-7)

Add complete Academy backend (Go) and frontend (Next.js) for DSGVO/IT-Security/AI-Literacy compliance training:
- Go backend: Course CRUD, enrollments, quiz evaluation, PDF certificates (gofpdf), video generation pipeline (ElevenLabs + HeyGen)
- In-memory data store with PostgreSQL migration for future DB support
- Frontend: Course creation (AI + manual), lesson viewer, interactive quiz, certificate viewer with PDF download
- Fix existing compile errors in generate.go (SearchResult type mismatch), llm/service.go (unused var), rag/service.go (Unicode chars)

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

admin-v2/ai-compliance-sdk/internal/llm/service.go

@@ -45,7 +45,7 @@ func (s *Service) GenerateDSFA(ctx context.Context, context map[string]interface
 	}
 
 	// Build prompt with context and RAG sources
-	prompt := s.buildDSFAPrompt(context, ragSources)
+	_ = s.buildDSFAPrompt(context, ragSources)
 
 	// In production, this would call the Anthropic API
 	// response, err := s.callAnthropicAPI(ctx, prompt)