error handling

backend/src/error.rs

@@ -72,7 +72,10 @@ impl From<diesel::result::Error> for AppError {
     fn from(value: diesel::result::Error) -> Self {
         match value {
             diesel::result::Error::NotFound => AppError::not_found(),
-            _ => AppError::internal(value),
+            other => {
+                tracing::error!(error = ?other, "database operation failed");
+                AppError::internal("database operation failed")
+            }
         }
     }
 }