refactor: mover .go de tipos Go a functions/{domain}/ para compilación unificada

Los archivos .go de tipos ahora viven junto a las funciones en functions/{domain}/
(mismo paquete Go), resolviendo errores de compilación por tipos no encontrados
(Option, Pair, Result, etc.). Los .md de metadata permanecen en types/{domain}/
con file_path actualizado a functions/. Se elimina types.go duplicado de infra.

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

functions/cybersecurity/threat_result.go

@@ -0,0 +1,21 @@
+package cybersecurity
+
+// ThreatResult is a sum type for SQL injection detection results.
+type ThreatResult interface{ threatResult() }
+
+// Clean indicates no threat was detected.
+type Clean struct{}
+
+// Suspicious indicates a possible threat with a reason.
+type Suspicious struct {
+	Reason string
+}
+
+// Malicious indicates a confirmed threat pattern.
+type Malicious struct {
+	Pattern string
+}
+
+func (Clean) threatResult()      {}
+func (Suspicious) threatResult() {}
+func (Malicious) threatResult()  {}