feat(iace): per-category hazard caps for precision improvement

Add categoryHazardCap() with ISO 12100-proportional limits:
- mechanical: 3x components (min 15, max 60)
- electrical: 1x components (min 8, max 20)
- secondary (thermal, noise, material): 4-8
- software/IT/organizational: 2-5 (minimal for machinery assessment)

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

ai-compliance-sdk/internal/api/handlers/iace_handler_init.go

@@ -159,6 +159,7 @@ func (h *IACEHandler) InitializeProject(c *gin.Context) {
 
 		created := 0
 		seenCatZone := make(map[string]bool)
+		catCount := make(map[string]int)
 		for _, mp := range matchOutput.MatchedPatterns {
 			// Narrative relevance filter: skip patterns whose zone/scenario
 			// mentions machine-specific terms that don't appear in our components
@@ -167,6 +168,12 @@ func (h *IACEHandler) InitializeProject(c *gin.Context) {
 			}
 
 			for _, cat := range mp.HazardCats {
+				// Per-category cap: limit hazards per category based on relevance
+				maxForCat := categoryHazardCap(cat, len(comps))
+				if catCount[cat] >= maxForCat {
+					continue
+				}
+
 				// Dedup by category + normalized zone
 				zoneKey := normalizeZoneKey(mp.ZoneDE)
 				if zoneKey == "" {
@@ -212,6 +219,7 @@ func (h *IACEHandler) InitializeProject(c *gin.Context) {
 				})
 				if cerr == nil {
 					created++
+					catCount[cat]++
 					hazardIDsByCategory[cat] = hz.ID
 				}
 			}