Added more comment

src/pages/api/stats/[id]/export.tsx

@@ -106,7 +106,6 @@ interface SkillsFeedbackResponse extends SkillsFeedbackRequest {
 }
 
 const getSkillsFeedback = async (sections: SkillsFeedbackRequest[]) => {
-  try {
   const backendRequest = await axios.post(
     `${process.env.BACKEND_URL}/grading_summary`,
     { sections },
@@ -118,11 +117,9 @@ const getSkillsFeedback = async (sections: SkillsFeedbackRequest[]) => {
   );
 
   return backendRequest.data?.sections;
-  } catch (err) {
-    return err;
-  }
 };
 
+// perform the request with several retries if needed
 const handleSkillsFeedbackRequest = async (
   sections: SkillsFeedbackRequest[]
 ): Promise<SkillsFeedbackResponse[] | null> => {
@@ -150,6 +147,8 @@ const generateQRCode = async (link: string) => {
   }
 };
 
+// Radial Progress PNGs were generated with only two colors
+// and they use some baseline score (10%, 20%, 30%..)
 type RADIAL_PROGRESS_COLOR = "laranja" | "azul";
 
 const getRadialProgressPNG = (
@@ -157,6 +156,8 @@ const getRadialProgressPNG = (
   score: number,
   total: number
 ) => {
+  // calculate the percentage of the score
+  // and round it to the closest available image
   const percent = (score / total) * 100;
   const remainder = percent % 10;
   const roundedPercent = percent - remainder;