feat(iace): add data-driven Architektur & Datenfluss explainer tab

Adds an auditor-facing view of the IACE engine: a clickable 10-stage
pipeline flow (Grenzen-Formular → ParseNarrative → Pattern-Gates →
Relevanz → Caps → Gefährdungen → Maßnahmen → Risiko → Normen → Matrix),
plus live library counts, the data-source/license register (incl. the
DIN/Beuth + DGUV exclusions), and the norm-matching logic that reconciles
DIN/ISO/OSHA machine-type vocabulary via canonicalMachineType folding.

Backend: BuildArchitecture() with LIVE counts so the diagram can never
drift; GET /iace/architecture; collectAllNorms() extracted from
SuggestNorms as the single source of truth for the norm-library count.
Frontend: useArchitecture hook + page + new IACE nav tab.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

ai-compliance-sdk/internal/iace/norms_engine.go

@@ -23,7 +23,9 @@ type NormSuggestionResult struct {
 // identified hazard categories, and component/energy tags.
 // A-norms are always included (they apply universally). B/C norms are matched
 // by machine type (confidence 0.9), hazard category (0.8), or tag (0.7).
-func SuggestNorms(machineType string, hazardCategories []string, tags []string) *NormSuggestionResult {
+// collectAllNorms aggregates every A/B/C norm source into one slice. Single
+// source of truth used by SuggestNorms and the architecture self-description.
+func collectAllNorms() []NormReference {
 	allNorms := GetNormsLibrary()
 	allNorms = append(allNorms, GetExtendedB2Norms()...)
 	allNorms = append(allNorms, GetCNormsLibrary()...)
@@ -48,6 +50,11 @@ func SuggestNorms(machineType string, hazardCategories []string, tags []string)
 	allNorms = append(allNorms, GetWave3dExtCNorms()...)
 	allNorms = append(allNorms, GetWave3dHvacCNorms()...)
 	allNorms = append(allNorms, GetFinalCNorms()...)
+	return allNorms
+}
+
+func SuggestNorms(machineType string, hazardCategories []string, tags []string) *NormSuggestionResult {
+	allNorms := collectAllNorms()
 
 	// Build lookup sets for efficient matching
 	hazardSet := toSet(hazardCategories)