feat(ai-sdk): classify NIST/OWASP/Grundschutz as technical_standard (#37)

ai-compliance-sdk/internal/ucca/authority_rerank.go

@@ -64,7 +64,7 @@ func bestBindingSemantic(results []LegalSearchResult, wantsIntent bool) float64
 	}
 	best := 0.0
 	for _, r := range results {
-		if r.SourceClass == "binding_law" && r.Score > best {
+		if classifyAuthority(r).sourceClass == "binding_law" && r.Score > best {
 			best = r.Score
 		}
 	}
@@ -152,12 +152,14 @@ func rerankByAuthority(query string, results []LegalSearchResult) []LegalSearchR
 func liftAboveBinding(out, raw []LegalSearchResult, bestBindingSem float64, sourceClass string) {
 	bestBindingFinal := 0.0
 	for i := range out {
-		if out[i].SourceClass == "binding_law" && out[i].Score > bestBindingFinal {
+		if classifyAuthority(out[i]).sourceClass == "binding_law" && out[i].Score > bestBindingFinal {
 			bestBindingFinal = out[i].Score
 		}
 	}
 	for i := range out {
-		if out[i].SourceClass != sourceClass || raw[i].Score < bestBindingSem-intentLiftMargin {
+		// Classify (not raw payload) so the untagged legacy corpus — e.g. NIST ingested
+		// before source_class tagging — is still recognized as its interpretative class.
+		if classifyAuthority(out[i]).sourceClass != sourceClass || raw[i].Score < bestBindingSem-intentLiftMargin {
 			continue
 		}
 		lifted := bestBindingFinal + intentLiftGain + (raw[i].Score - bestBindingSem)