Initial commit - SOGOMS v1.0.0

- sogoctl: supervisor avec health checks et restart auto
- sogoway: gateway HTTP, auth JWT, routing par hostname
- sogoms-db: microservice MariaDB avec pool par application
- Protocol IPC Unix socket JSON length-prefixed
- Config YAML multi-application (prokov)
- Deploy script pour container Alpine gw3

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

clients/prokov/api/config/Database.php

@@ -0,0 +1,39 @@
+<?php
+/**
+ * Connexion à la base de données (Singleton)
+ */
+
+declare(strict_types=1);
+
+class Database
+{
+    private static ?PDO $instance = null;
+
+    public static function getInstance(): PDO
+    {
+        if (self::$instance === null) {
+            try {
+                self::$instance = new PDO(
+                    sprintf('mysql:host=%s;dbname=%s;charset=utf8mb4', DB_HOST, DB_NAME),
+                    DB_USER,
+                    DB_PASS,
+                    [
+                        PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
+                        PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC,
+                        PDO::ATTR_EMULATE_PREPARES => false,
+                    ]
+                );
+            } catch (PDOException $e) {
+                Response::error('Database connection failed', 500);
+                exit;
+            }
+        }
+
+        return self::$instance;
+    }
+
+    // Empêcher le clonage et la désérialisation
+    private function __construct() {}
+    private function __clone() {}
+    public function __wakeup() {}
+}