PAR-778: step 1 - bump integration-core to ^5.1

Register the new AdvancedSettings DataAccess entity in
BootstrapComponent::initRepositories so the lazy resolution of
AdvancedSettingsRepositoryInterface succeeds under v5.1.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: mescalantea

composer.json

@@ -6,7 +6,7 @@
         "php": "^8.4",
         "ext-json": "*",
         "laravel/framework": "^12.36.0",
-        "sequra/integration-core": "^4.0.0"
+        "sequra/integration-core": "^5.1"
     },
     "require-dev": {
         "phpunit/phpunit": "^10.1",