Fix schema matching when using multiple schema locations

When multiple schema locations are provided, ensure each resource
is validated against the correct schema by checking if the schema's
kind constraints match the expected resource type.

Fixes #299

🤖 Generated with [Claude Code](https://claude.ai/code)

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

pkg/validator/validator.go

@@ -384,7 +384,10 @@ func downloadSchema(registries []registry.Registry, l jsonschema.SchemeURLLoader
 			if err != nil {
 				continue
 			}
-			return schema, nil
+			if schema != nil && isSchemaForKind(schema, kind) {
+				return schema, nil
+			}
+			continue
 		}
 
 		if _, notfound := err.(*loader.NotFoundError); notfound {
@@ -399,3 +402,26 @@ func downloadSchema(registries []registry.Registry, l jsonschema.SchemeURLLoader
 
 	return nil, nil // No schema found - we don't consider it an error, resource will be skipped
 }
+
+func isSchemaForKind(schema *jsonschema.Schema, expectedKind string) bool {
+	if schema == nil {
+		return true
+	}
+
+	if schemaMap, ok := schema.Meta.(map[string]interface{}); ok {
+		if properties, ok := schemaMap["properties"].(map[string]interface{}); ok {
+			if kindProp, ok := properties["kind"].(map[string]interface{}); ok {
+				if enum, ok := kindProp["enum"].([]interface{}); ok && len(enum) > 0 {
+					if enumKind, ok := enum[0].(string); ok {
+						return enumKind == expectedKind
+					}
+				}
+				if constVal, ok := kindProp["const"].(string); ok {
+					return constVal == expectedKind
+				}
+			}
+		}
+	}
+
+	return true
+}