Add sketches into model, controller and service for the backend

add websocket

added 1 commit

• be4a8c06 - Add post request for sketch

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added 1 commit

• 5b1597fd - Use websocket for sketch

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added 1 commit

• 58b2576e - Improve websocket performance

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marked this merge request as ready

added 1 commit

• a03bc799 - Make websocket run faster with sketches

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approved this merge request

mentioned in commit 979ff8e8

merged