=== DingTalk Old API Send Attempt ===

Step 1: Get Old API Token
Token: 34140e285e9c3cd5b2e33d77a05c0e64

Step 2: Upload File via oapi.dingtalk.com
{"errcode": 0, "errmsg": "ok", "media_id": "@lArPD1kx2xtGuiXOCylPjc5udNwh", "created_at": 1772683126410, "type": "file"}

Media ID: @lArPD1kx2xtGuiXOCylPjc5udNwh

Step 3: Send sampleFile message
{"errcode": 40035, "errmsg": "缺少参数 access_token"}

=== SEND FAILED ===
Error: 缺少参数 access_token