water/server/scripts/migrate_water_enterprise_employee_count.php

<?php
/** Add headcount for platform replenishment estimates; never infer existing company sizes. */
require dirname(__DIR__).'/vendor/autoload.php';
\Dotenv\Dotenv::createUnsafeMutable(dirname(__DIR__))->load();
\support\App::loadAllConfig(['route']);
use plugin\saiadmin\app\model\water\WaterEnterprise;
$schema=(new WaterEnterprise())->getConnection()->getSchemaBuilder();
if (!in_array('--apply',$argv,true)) {
    echo "Plan: add nullable employee_count; existing enterprise headcounts remain unknown.\n";
    exit;
}
if (!$schema->hasColumn('sa_water_enterprise','employee_count')) {
    $schema->table('sa_water_enterprise',function (\Illuminate\Database\Schema\Blueprint $table) {
        $table->unsignedInteger('employee_count')->nullable()->comment('公司人数，NULL为未登记');
    });
}
echo "Applied: enterprise employee_count available; stock, entitlements and deliveries preserved.\n";