Fix service selection to support internal storage services.

Internal storage services like 'site---internal---storage' appear in metrics
data but not in the deployment structure. This change adds derived internal
storage service names for each webapp to the list of selectable services,
allowing them to be filtered with --service option while maintaining strict
validation.

Fixes CLI-60.

Generated with Claude Code (https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>

Author: pjcdawkins

src/Command/Metrics/MetricsCommandBase.php

@@ -247,7 +247,13 @@ protected function fetchMetrics(InputInterface $input, TimeSpec $timeSpec, Envir
         $servicesInput = ArrayArgument::getOption($input, 'service');
         $selectedServiceNames = [];
         if (!empty($servicesInput)) {
-            $selectedServiceNames = Wildcard::select(array_merge(array_keys($allServices), ['router']), $servicesInput);
+            // Build a list of selectable service names, including internal storage services.
+            $selectableServiceNames = array_merge(array_keys($allServices), ['router']);
+            // Add internal storage services for each webapp.
+            foreach (array_keys($deployment->webapps) as $appName) {
+                $selectableServiceNames[] = $appName . '---internal---storage';
+            }
+            $selectedServiceNames = Wildcard::select($selectableServiceNames, $servicesInput);
             if (!$selectedServiceNames) {
                 $this->stdErr->writeln('No services were found matching the name(s): <error>' . implode(', ', $servicesInput) . '</error>');
                 return false;