fix: OpenTelemetry schema URL panic (#2012)

`resource.Merge` returns an error only when schemas don't match.

Author: disq

serve/opentelemetry.go

@@ -26,10 +26,15 @@ import (
 
 // newResource returns a resource describing this application.
 func newResource(p *plugin.Plugin) *resource.Resource {
+	def := resource.Default()
+	schemaURL := def.SchemaURL()
+	if schemaURL == "" {
+		schemaURL = semconv.SchemaURL
+	}
 	r, err := resource.Merge(
-		resource.Default(),
+		def,
 		resource.NewWithAttributes(
-			semconv.SchemaURL,
+			schemaURL,
 			semconv.ServiceName("cloudquery-"+p.Name()),
 			semconv.ServiceVersion(p.Version()),
 		),