fix(model): 覆写 performInsertOrIgnore 兼容 MySQL

L13 默认走 insertOrIgnoreReturning(INSERT ... ON CONFLICT ... RETURNING),
MySQL/MariaDB grammar 不支持该变体,导致全仓 saveOrIgnore() 调用抛异常。
改用 INSERT IGNORE + lastInsertId() 回填自增ID,保持与框架一致的返回语义。

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

app/Models/AbstractModel.php

@@ -5,6 +5,7 @@ namespace App\Models;
 use App\Exceptions\ApiException;
 use App\Module\Base;
 use DateTimeInterface;
+use Illuminate\Database\Eloquent\Builder;
 use Illuminate\Database\Eloquent\Factories\HasFactory;
 use Illuminate\Database\Eloquent\Model;
 use Illuminate\Support\Facades\DB;
@@ -201,6 +202,58 @@ class AbstractModel extends Model
         return $instance;
     }
 
+    /**
+     * 覆写框架 saveOrIgnore 的底层插入逻辑。
+     *
+     * 框架默认走 insertOrIgnoreReturning（INSERT ... ON CONFLICT ... RETURNING），
+     * MySQL/MariaDB 的 grammar 不支持该变体，会抛
+     * "This database engine does not support insert or ignore with returning."。
+     * 这里改用 MySQL 支持的 INSERT IGNORE，并在成功插入时手动回填自增ID，
+     * 保持与框架一致的返回语义（冲突被忽略时返回 false）。
+     *
+     * @param  \Illuminate\Database\Eloquent\Builder  $query
+     * @param  array|string|null  $uniqueBy
+     * @return bool
+     */
+    protected function performInsertOrIgnore(Builder $query, array|string|null $uniqueBy)
+    {
+        if ($this->usesUniqueIds()) {
+            $this->setUniqueIds();
+        }
+
+        if ($this->fireModelEvent('creating') === false) {
+            return false;
+        }
+
+        if ($this->usesTimestamps()) {
+            $this->updateTimestamps();
+        }
+
+        $attributes = $this->getAttributesForInsert();
+
+        if (empty($attributes)) {
+            return true;
+        }
+
+        if ($query->toBase()->insertOrIgnore($attributes) === 0) {
+            return false;
+        }
+
+        if ($this->getIncrementing()) {
+            $this->setAttribute(
+                $this->getKeyName(),
+                $query->getConnection()->getPdo()->lastInsertId()
+            );
+        }
+
+        $this->exists = true;
+        $this->wasRecentlyCreated = true;
+
+        $this->fireModelEvent('created', false);
+
+        return true;
+    }
+
     /**
      * 更新数据校验
      * @param array $param