feat(gap): Regulatory Gap Analysis Engine — Phase A Backend

Product Profile → Regulatory Classification → MC Gap Assessment → Priority List.

- 12 regulations supported (CRA, AI Act, NIS2, DSGVO, Data Act, MiCA, PSD2, AML, MDR, Machinery, TDDDG, LkSG)
- Scope signal extraction from product profile
- Priority scoring: Severity × Deadline × Dependency
- 5 industry templates (IoT, Exchange, Cobot, SaaS, Medical)
- 8 API endpoints under /sdk/v1/gap/
- DB migration for gap_projects table
- Full build passes

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

ai-compliance-sdk/internal/app/app.go

@@ -152,6 +152,9 @@ func buildRouter(cfg *config.Config, pool *pgxpool.Pool) *gin.Engine {
 	maximizerSvc := maximizer.NewService(maximizerStore, uccaStore, maximizerRules)
 	maximizerHandlers := handlers.NewMaximizerHandlers(maximizerSvc)
 
+	// Gap Analysis
+	gapHandler := handlers.NewGapHandler(pool)
+
 	rbacMiddleware := rbac.NewMiddleware(rbacService, policyEngine)
 
 	// Router
@@ -176,7 +179,7 @@ func buildRouter(cfg *config.Config, pool *pgxpool.Pool) *gin.Engine {
 		uccaHandlers, escalationHandlers, obligationsHandlers, ragHandlers,
 		roadmapHandlers, workshopHandlers, portfolioHandlers,
 		academyHandlers, trainingHandlers, whistleblowerHandlers, iaceHandler,
-		maximizerHandlers, regulatoryNewsHandlers)
+		gapHandler, maximizerHandlers, regulatoryNewsHandlers)
 
 	return router
 }