Add SportPath auth APIs and training content foundation

public/api/v1/health.php

@@ -0,0 +1,14 @@
+<?php
+declare(strict_types=1);
+
+require_once __DIR__ . '/_bootstrap.php';
+api_method('GET');
+
+try {
+    AppConfig::loadEnvironment();
+    Database::getInstance()->getConnection()->query('SELECT 1');
+    api_json(['status' => 'ok', 'database' => 'ok']);
+} catch (Throwable $exception) {
+    error_log('Health check dependency unavailable: ' . $exception->getMessage());
+    api_json(['status' => 'unavailable'], 503);
+}