feat(database): configure standalone health checks

Add configurable health check settings for standalone databases and apply them to generated Docker Compose services. Allow disabling health checks and cover the behavior with feature tests.

app/Traits/HasDatabaseHealthCheck.php

@@ -0,0 +1,34 @@
+<?php
+
+namespace App\Traits;
+
+/**
+ * Shared healthcheck behaviour for standalone database models.
+ *
+ * Standalone databases use a fixed, type-specific probe command (psql, redis-cli, ...),
+ * so only the timing fields and the enable/disable flag are configurable.
+ */
+trait HasDatabaseHealthCheck
+{
+    public function isHealthcheckEnabled(): bool
+    {
+        return (bool) ($this->health_check_enabled ?? true);
+    }
+
+    /**
+     * Build the Docker Compose healthcheck block for the given probe command.
+     *
+     * @param  array<int, string>  $test  The Docker `test` array (e.g. ['CMD', 'pg_isready']).
+     * @return array<string, mixed>
+     */
+    public function healthCheckConfiguration(array $test): array
+    {
+        return [
+            'test' => $test,
+            'interval' => ($this->health_check_interval ?? 15).'s',
+            'timeout' => ($this->health_check_timeout ?? 5).'s',
+            'retries' => $this->health_check_retries ?? 5,
+            'start_period' => ($this->health_check_start_period ?? 5).'s',
+        ];
+    }
+}