handle empty string and clarify level formatting

Author: lia-viam

src/viam/sdk/config/resource.cpp

@@ -155,14 +155,15 @@ void to_proto_impl<ResourceConfig>::operator()(const ResourceConfig& self,
 
 ResourceConfig from_proto_impl<app::v1::ComponentConfig>::operator()(
     const app::v1::ComponentConfig* proto) const {
+    const std::string& level_str = proto->log_configuration().level();
     return ResourceConfig(proto->type(),
                           proto->name(),
                           proto->namespace_(),
                           from_proto(proto->attributes()),
                           proto->api(),
                           Model::from_str(proto->model()),
                           proto->has_frame() ? from_proto(proto->frame()) : LinkConfig{},
-                          level_from_string(proto->log_configuration().level()));
+                          level_str.empty() ? log_level::info : level_from_string(level_str));
 }
 
 std::vector<ResourceConfig>

src/viam/sdk/log/logger.cpp

@@ -54,7 +54,7 @@ log_level level_from_string(std::string level) {
         return ll::fatal;
     }
 
-    VIAM_LOG(warn) << "Returning unknown log level " << level << " as info";
+    VIAM_LOG(warn) << "Returning unknown log level `" << level << "` as info";
     return ll::info;
 }