- **fix(errors):** ensure proper error handling with errors.Is instead of direct comparison for http.ErrServerClosed

- **fix(sql):** wrap `rows.Close` in a `defer` function to safely handle potential close errors
- **fix(api):** handle JSON encoding errors in API responses to prevent unhandled edge cases
- **docs:** correct typos and improve phrasing in `.claude/CLAUDE.md`
- **test:** add error handling for `UpdateEvent` in test cases

cmd/diunwebhook/main.go

@@ -2,6 +2,7 @@ package main
 
 import (
 	"context"
+	"errors"
 	"log"
 	"net/http"
 	"os"
@@ -44,7 +45,7 @@ func main() {
 
 	go func() {
 		log.Printf("Listening on :%s", port)
-		if err := srv.ListenAndServe(); err != nil && err != http.ErrServerClosed {
+		if err := srv.ListenAndServe(); err != nil && !errors.Is(err, http.ErrServerClosed) {
 			log.Fatalf("ListenAndServe: %v", err)
 		}
 	}()