fix(v5): defer production runtime activation

Remove Flux token provisioning and container role handling from production.
Restore private server IP support and document the activation checklist.

tests/Unit/ValidServerIpTest.php

@@ -0,0 +1,23 @@
+<?php
+
+use App\Rules\ValidServerIp;
+use Tests\TestCase;
+
+uses(TestCase::class);
+
+it('accepts private and reserved IP addresses like the next branch', function (string $ip) {
+    $rule = new ValidServerIp;
+    $failCalled = false;
+
+    $rule->validate('ip', $ip, function () use (&$failCalled): void {
+        $failCalled = true;
+    });
+
+    expect($failCalled)->toBeFalse();
+})->with([
+    'private IPv4' => '192.168.1.10',
+    'loopback IPv4' => '127.0.0.1',
+    'link-local IPv4' => '169.254.1.10',
+    'loopback IPv6' => '::1',
+    'unique local IPv6' => 'fd00::1',
+]);