Add Thumbnail image to DCR model for Audio Articles

[oliverabrahams]

What is the value of this and can you measure success?

Add the thumbnail image to the DCR json for the audio Article

What does this change?

The Json sent for audio articles now contains a new optional field audioArticleImage

Screenshots

Before	After

Checklist

• [x] Tested locally, and on CODE if necessary
• [ ] Will not break dotcom-rendering

[github-actions[bot]]

Deploy build 2938 of dotcom:frontend-all to CODE

All deployment options

- [Deploy build 2938 of `dotcom:frontend-all` to CODE](https://riffraff.gutools.co.uk/deployment/deployAgain?project=dotcom%3Afrontend-all&build=2938&stage=CODE&updateStrategy=MostlyHarmless&action=deploy) - [Deploy parts of build 2938 to CODE by previewing it first](https://riffraff.gutools.co.uk/preview/yaml?project=dotcom%3Afrontend-all&build=2938&stage=CODE&updateStrategy=MostlyHarmless) - [What's on CODE right now?](https://riffraff.gutools.co.uk/deployment/history?projectName=dotcom%3Afrontend-all&stage=CODE)

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From guardian/actions-riff-raff.

[prout-bot]

Seen on FRONTS-PROD (merged by @oliverabrahams 12 minutes and 55 seconds ago)

• Check your changes on www.theguardian.com ✔️
• Keep an eye on the deploy dashboard&_a=(description:'',filters:!(),fullScreenMode:!f,options:(darkTheme:!f,useMargins:!f),panels:!((gridData:(h:4,i:'4',w:6,x:6,y:0),id:'735f9ce0-4a04-11e7-9f15-395e2d1c9b1f',panelIndex:'4',type:visualization,version:'6.2.4'),(gridData:(h:4,i:'5',w:6,x:0,y:0),id:b9249830-4a03-11e7-91e8-2fbfd59c38bb,panelIndex:'5',type:visualization,version:'6.2.4'),(gridData:(h:4,i:'7',w:6,x:0,y:4),id:ac507b90-4a0f-11e7-9f15-395e2d1c9b1f,panelIndex:'7',type:visualization,version:'6.2.4'),(gridData:(h:4,i:'9',w:6,x:6,y:4),id:a5f78860-4ad2-11e7-9930-73b4968e85d8,panelIndex:'9',type:visualization,version:'6.2.4')),query:(language:lucene,query:(query_string:(analyze_wildcard:!t,query:'stage:PROD%20NOT%20app:preview'))),timeRestore:!f,title:'Frontend%20PROD%20Deploy',viewMode:view)) 📉

[prout-bot]

Seen on ADMIN-PROD (merged by @oliverabrahams 13 minutes ago)

• Check your changes on www.theguardian.com ✔️
• Keep an eye on the deploy dashboard&_a=(description:'',filters:!(),fullScreenMode:!f,options:(darkTheme:!f,useMargins:!f),panels:!((gridData:(h:4,i:'4',w:6,x:6,y:0),id:'735f9ce0-4a04-11e7-9f15-395e2d1c9b1f',panelIndex:'4',type:visualization,version:'6.2.4'),(gridData:(h:4,i:'5',w:6,x:0,y:0),id:b9249830-4a03-11e7-91e8-2fbfd59c38bb,panelIndex:'5',type:visualization,version:'6.2.4'),(gridData:(h:4,i:'7',w:6,x:0,y:4),id:ac507b90-4a0f-11e7-9f15-395e2d1c9b1f,panelIndex:'7',type:visualization,version:'6.2.4'),(gridData:(h:4,i:'9',w:6,x:6,y:4),id:a5f78860-4ad2-11e7-9930-73b4968e85d8,panelIndex:'9',type:visualization,version:'6.2.4')),query:(language:lucene,query:(query_string:(analyze_wildcard:!t,query:'stage:PROD%20NOT%20app:preview'))),timeRestore:!f,title:'Frontend%20PROD%20Deploy',viewMode:view)) 📉