feat: Inline context for migration events

Author: keelerm84

src/LaunchDarkly/Migrations/OpTracker.php

@@ -140,7 +140,7 @@ public function build(): array|string
         $event = [
             'kind' => 'migration_op',
             'creationDate' => Util::currentTimeUnixMillis(),
-            'contextKeys' => $this->context->getKeys(),
+            'context' => $this->context,
             'operation' => $this->operation->value,
             'evaluation' => [
                 'key' => $this->key,

test-service/TestService.php

@@ -76,7 +76,7 @@ public function getStatus(): array
                 'secure-mode-hash',
                 'migrations',
                 'event-sampling',
-                'inline-context',
+                'inline-context-all',
                 'anonymous-redaction',
                 'client-prereq-events',
                 'big-segments'

tests/Migrations/OpTrackerTest.php

@@ -47,7 +47,7 @@ public function testCanBuildSuccessfully(): void
         $this->assertIsArray($result, 'tracker failed to build event');
         $this->assertEquals('migration_op', $result['kind']);
         $this->assertEquals('read', $result['operation']);
-        $this->assertSame(['user' => 'user-key'], $result['contextKeys']);
+        $this->assertEquals(LDContext::create('user-key'), $result['context']);
 
         $evaluation = $result['evaluation'];
         $this->assertEquals('flag', $evaluation['key']);