feat: reload config on-demand

.github/pull_request_template.md

@@ -0,0 +1,16 @@
+[//]: #  (Link to the issue corresponding to this chunk of work)
+:tickets: Fixes __issue__
+:scroll: Design Doc: __link if applicable__
+
+## Motivation and Context
+[//]: #  (Why is this change required? What problem does it solve?)
+
+## Description
+[//]: # (Describe your changes in detail)
+
+## How has this been documented?
+[//]: # (Please describe how you documented the developer impact of your changes; link to PRs or issues or explan why no documentation changes are required)
+
+## How has this been tested?
+[//]: # (Please describe in detail how you tested your changes)
+

src/EppoClient.php

@@ -573,6 +573,20 @@ private function checkExpectedType(
             ($expectedVariationType == VariationType::JSON)); // JSON type check un-necessary here.
     }
 
+    /**
+     * @throws EppoClientException
+     */
+    public function fetchAndActivateConfiguration(): void
+    {
+        try {
+            $this->configurationLoader->reloadConfiguration();
+        } catch (HttpRequestException|InvalidApiKeyException|InvalidConfigurationException $e) {
+            if ($this->isGracefulMode) {
+                error_log('[Eppo SDK] Error fetching configuration ' . $e->getMessage());
+            }
+            throw EppoClientException::from($e);
+        }
+    }
 
     public function startPolling(): void
     {

tests/EppoClientTest.php

@@ -325,12 +325,9 @@ public function testInitWithPollingOptions(): void
         $client = EppoClient::init(
             $apiKey,
             "fake address",
-            null,
-            null,
-            $httpClient,
-            null,
-            false,
-            $pollingOptions
+            httpClient: $httpClient,
+            isGracefulMode: false,
+            pollingOptions: $pollingOptions
         );
 
         $this->assertEquals(