Add edge gateway broker configurations and session management routes

- Add broker-related configuration classes (`broker_url`, `public_broker_url`, `auth_mode`, `shared_secret`) to support edge gateway functionality.
- Enhance `SelfserveRoute` with routes for managing self-serve wash sessions, including session listing, detail retrieval, and forced lane stop.
- Update unit tests to validate new configuration handling, session routes, and OpenAPI endpoint coverage.
- Include default environment variables for broker settings in `docker-compose.example.yml`.

services/nginx/app/tests/Unit/Selfserve/EdgeGatewayManagerUrlTest.php

@@ -1,8 +1,10 @@
 <?php
 
 app_require('classes/edge_gateway_manager.php');
+app_require('modules/edgegateway/config/edgegateway_public_broker_url_c.php');
 
 use classes\edge_gateway_manager;
+use modules\edgegateway\config\edgegateway_public_broker_url_c;
 
 class EdgeGatewayManagerUrlHarness extends edge_gateway_manager
 {
@@ -15,8 +17,13 @@ function with_edge_gateway_server_state(array $server, callable $callback): void
 {
     $originalServer = $_SERVER;
     $originalPublicApiUrl = getenv('EDGE_PUBLIC_API_URL');
+    $originalPublicBrokerUrl = getenv('EDGE_PUBLIC_BROKER_URL');
+    $publicBrokerConfig = new edgegateway_public_broker_url_c();
+    $originalPublicBrokerConfig = $publicBrokerConfig->getVariableValue();
 
     $_SERVER = $server;
+    putenv('EDGE_PUBLIC_BROKER_URL');
+    $publicBrokerConfig->setVariableValue('');
 
     try {
         $callback();
@@ -27,6 +34,12 @@ function with_edge_gateway_server_state(array $server, callable $callback): void
         } else {
             putenv('EDGE_PUBLIC_API_URL=' . $originalPublicApiUrl);
         }
+        if ($originalPublicBrokerUrl === false) {
+            putenv('EDGE_PUBLIC_BROKER_URL');
+        } else {
+            putenv('EDGE_PUBLIC_BROKER_URL=' . $originalPublicBrokerUrl);
+        }
+        $publicBrokerConfig->setVariableValue($originalPublicBrokerConfig);
     }
 }