fix(changepackage): treat HTTP 200 as success and repair resource modify calls

VirtFusion v7's PUT /servers/{id}/package/{pkg} returns HTTP 200 (with an
{info:[...]} body), not 204. changePackage() only accepted 204, so every
successful package change fell through to the default case and reported
"Update package request failed. VirtFusion API returned HTTP 200" — the
exact error seen in production. The early return also skipped the
memory/CPU/traffic modify loop entirely.

- Accept 200 (and keep 204) as success; log the info array so operator can
  see skipped changes (e.g. "primary disk not updated... lower than current").
- modifyResource(): send cpuCores as the spec-required "cores" body field
  (wrong field name omitted the required property → CPU changes rejected).
- modifyResource(): accept 201 alongside 200/204 — VF v7 returns 201 Created
  on modify, mirroring the existing rename-endpoint fix.
- Surface modifyResource() failures in the package-change loop instead of
  swallowing them.

Disk-downgrade safety is unchanged and confirmed: no disk flag is sent, the
modify allowlist excludes storage, no disk-modify endpoint exists, and VF
itself refuses to shrink the primary disk.

Verified against the VirtFusion v7 OpenAPI spec.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

modules/servers/VirtFusionDirect/lib/Module.php

@@ -789,12 +789,20 @@ class Module
                 return false;
             }
 
-            $ctx['request']->addOption(CURLOPT_POSTFIELDS, json_encode([$resource => $value]));
+            // The /modify/{resource} endpoints name their body field differently from our
+            // internal resource key: cpuCores is sent as "cores" (memory/traffic match 1:1).
+            // Sending the wrong field name omits the required property and the change is rejected.
+            $fieldMap = ['memory' => 'memory', 'cpuCores' => 'cores', 'traffic' => 'traffic'];
+            $field = $fieldMap[$resource];
+
+            $ctx['request']->addOption(CURLOPT_POSTFIELDS, json_encode([$field => $value]));
             $data = $ctx['request']->put($ctx['cp']['url'] . '/servers/' . $ctx['serverId'] . '/modify/' . $resource);
             Log::insert(__FUNCTION__ . ':' . $resource, $ctx['request']->getRequestInfo(), $data);
 
-            $httpCode = $ctx['request']->getRequestInfo('http_code');
-            if ($httpCode == 200 || $httpCode == 204) {
+            // VF v7 returns 201 (Created) on a successful modify; older builds returned 200/204.
+            // Accept all three so we cover the version range (mirrors the rename-endpoint fix).
+            $httpCode = (int) $ctx['request']->getRequestInfo('http_code');
+            if ($httpCode == 200 || $httpCode == 201 || $httpCode == 204) {
                 return json_decode($data) ?: (object) ['success' => true];
             }