refactor(go/iace): split hazard_library and store into focused files under 500 LOC

All oversized iace files now comply with the 500-line hard cap:
- hazard_library_ai_sw.go split into ai_sw (false_classification..communication)
  and ai_fw (unauthorized_access..update_failure)
- hazard_library_software_hmi.go split into software_hmi (software_fault+hmi)
  and config_integration (configuration_error+logging+integration)
- hazard_library_machine_safety.go split to keep mechanical/electrical/thermal/emc,
  safety_functions extracted into hazard_library_safety_functions.go
- store_hazards.go split: hazard library queries moved to store_hazard_library.go
- store_projects.go split: component and classification ops to store_components.go
- store_mitigations.go split: evidence/verification/ref-data to store_evidence.go
- hazard_library.go GetBuiltinHazardLibrary() updated to call all sub-functions
- All iace tests pass (go test ./internal/iace/...)

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

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

@@ -33,8 +33,11 @@ func mustMarshalJSON(v interface{}) json.RawMessage {
 func GetBuiltinHazardLibrary() []HazardLibraryEntry {
 	var all []HazardLibraryEntry
 	all = append(all, builtinHazardsAISW()...)
+	all = append(all, builtinHazardsAIFW()...)
 	all = append(all, builtinHazardsSoftwareHMI()...)
+	all = append(all, builtinHazardsConfigIntegration()...)
 	all = append(all, builtinHazardsMachineSafety()...)
+	all = append(all, builtinHazardsSafetyFunctions()...)
 	all = append(all, builtinHazardsISO12100Mechanical()...)
 	all = append(all, builtinHazardsISO12100ElectricalThermal()...)
 	all = append(all, builtinHazardsISO12100Pneumatic()...)