Fix Google Sheets API valueInputOption parameter handling

- Move valueInputOption from JSON body to query parameter as required by Google Sheets API
- Update make_api_request method to properly extract and append valueInputOption as URL parameter
- Resolves 'Invalid JSON payload received. Unknown name valueInputOption' error
- Google Sheets API calls now use correct parameter structure

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

wordpress-dev/wordpress/wp-content/plugins/hvac-community-events/includes/google-sheets/class-google-sheets-auth.php

@@ -207,6 +207,12 @@ class HVAC_Google_Sheets_Auth {
         $base_url = ($api_type === 'drive') ? $this->drive_api_url : $this->sheets_api_url;
         $url = $base_url . $endpoint;
         
+        // Handle valueInputOption as query parameter for Sheets API
+        if ($data && isset($data['valueInputOption'])) {
+            $url .= '?valueInputOption=' . urlencode($data['valueInputOption']);
+            unset($data['valueInputOption']); // Remove from body data
+        }
+        
         $args = array(
             'method' => $method,
             'headers' => array(