使用 HMAC SHA256 认证验证 Seatable Webhooks

• •HTTP Webhook 端点（n8n 会自动生成）

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      "name": "计算 sha256",
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      "position": [
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      "parameters": {
        "type": "SHA256",
        "action": "hmac",
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        "dataPropertyName": "seatable-signature"
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      "parameters": {
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      "parameters": {
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              "value2": "={{ String($json.headers['x-seatable-signature'].replace(\"sha256=\", \"\")) }}"
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    "hash matches": {
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