cubicweb #5507573 [web/json] Controller.publish must return encoded data [validation pending]

[web/json] Controller.publish must return encoded data

We were mixing binary from super() and text from our params, thus wrongly returning text.

prioritynormal
typebug
done in3.20.8
load0.250
load left0.000
closed by#1ce4594f9cf4 [web/json] Controller.publish must return encoded data
patch[web/json] Controller.publish must return encoded data [applied]