fix(nvs): Close NVS handle after processing key-value pairs to prevent resource leaks

main/io/nvs_handler.cpp

@@ -129,6 +129,7 @@ esp_err_t NVSStorageHandler::process_all(KeyValueProcessor processor, void* arg)
     // call the processor with the key and value
     std::string key_str = info.key;
     processor(arg, key_str, this->get(key_str));
+    nvs_close(temp_handle);
   }
   return ESP_OK;
 }
@@ -156,6 +157,7 @@ esp_err_t NVSStorageHandler::process_filtered(const std::string& key_prefix, Key
       }
       // call the processor with the key and value
       processor(arg, std::string(info.key), this->get(std::string(info.key)));
+      nvs_close(temp_handle);
     }
   }
   return ESP_OK;
@@ -186,6 +188,7 @@ esp_err_t NVSStorageHandler::process_filtered(FilterFunc filter_func, KeyValuePr
       }
       // call the processor with the key and value
       processor(arg, key_str, this->get(key_str));
+      nvs_close(temp_handle);
     }
   }
   return ESP_OK;