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.main = async (event, context) => {try {const { filePath, filename, contentType } = event;const fileResult = await wx.cloud.uploadFile({cloudPath: filename,filePath,maxTime: 60,timeout: 60,success: function (res) {console.log(res.fileID);},fail: function (err) {console.error('Upload failed:', err);}});const db = wx.cloud.database();await db.collection('files').add({data: {fileID: fileResult.fileID,filename,uploadedAt: new Date(),contentType}});return {success: true,fileID: fileResult.fileID};} catch (err) {return {success: false,error: err.message || 'Unknown error'};}">