Make SubscriptionDataConfig have readonly fields
Make SubscriptionDataConfig have readonly fields

bizcad/LeanAbhi,exhau/Lean,bizcad/LeanJJN,JKarathiya/Lean,AnshulYADAV007/Lean,bizcad/LeanITrend,bdilber/Lean,Obawoba/Lean,bizcad/Lean,wowgeeker/Lean,AnshulYADAV007/Lean,Neoracle/Lean,devalkeralia/Lean,bizcad/Lean,StefanoRaggi/Lean,Jay-Jay-D/LeanSTP,bizcad/LeanAbhi,desimonk/Lean,desimonk/Lean,dalebrubaker/Lean,bizcad/LeanJJN,bdilber/Lean,FrancisGauthier/Lean,squideyes/Lean,kaffeebrauer/Lean,rchien/Lean,tomhunter-gh/Lean,bizcad/LeanJJN,AlexCatarino/Lean,a-hart/Lean,dalebrubaker/Lean,racksen/Lean,mabeale/Lean,dpavlenkov/Lean,racksen/Lean,andrewhart098/Lean,Obawoba/Lean,Jay-Jay-D/LeanSTP,Neoracle/Lean,exhau/Lean,tomhunter-gh/Lean,FrancisGauthier/Lean,wowgeeker/Lean,jameschch/Lean,iamkingmaker/Lean,QuantConnect/Lean,florentchandelier/Lean,redmeros/Lean,AnObfuscator/Lean,JKarathiya/Lean,squideyes/Lean,wowgeeker/Lean,bizcad/LeanITrend,Mendelone/forex_trading,Obawoba/Lean,florentchandelier/Lean,dpavlenkov/Lean,Jay-Jay-D/LeanSTP,Neoracle/Lean,tomhunter-gh/Lean,jameschch/Lean,bizcad/LeanAbhi,squideyes/Lean,devalkeralia/Lean,Phoenix1271/Lean,StefanoRaggi/Lean,exhau/Lean,desimonk/Lean,racksen/Lean,iamkingmaker/Lean,jameschch/Lean,bizcad/LeanITrend,StefanoRaggi/Lean,AnshulYADAV007/Lean,florentchandelier/Lean,StefanoRaggi/Lean,AnshulYADAV007/Lean,kaffeebrauer/Lean,florentchandelier/Lean,dpavlenkov/Lean,young-zhang/Lean,rchien/Lean,tzaavi/Lean,a-hart/Lean,Mendelone/forex_trading,dalebrubaker/Lean,young-zhang/Lean,andrewhart098/Lean,mabeale/Lean,Mendelone/forex_trading,tzaavi/Lean,andrewhart098/Lean,bizcad/LeanITrend,kaffeebrauer/Lean,redmeros/Lean,devalkeralia/Lean,redmeros/Lean,mabeale/Lean,desimonk/Lean,kaffeebrauer/Lean,squideyes/Lean,AnObfuscator/Lean,racksen/Lean,Phoenix1271/Lean,Phoenix1271/Lean,exhau/Lean,redmeros/Lean,Jay-Jay-D/LeanSTP,jameschch/Lean,Phoenix1271/Lean,bizcad/Lean,young-zhang/Lean,FrancisGauthier/Lean,Neoracle/Lean,Mendelone/forex_trading,bizcad/LeanAbhi,bizcad/LeanJJN,andrewhart098/Lean,AnshulYADAV007/Lean,AnObfuscator/Lean,AlexCatarino/Lean,young-zhang/Lean,mabeale/Lean,JKarathiya/Lean,QuantConnect/Lean,Obawoba/Lean,FrancisGauthier/Lean,bdilber/Lean,AlexCatarino/Lean,tzaavi/Lean,tomhunter-gh/Lean,QuantConnect/Lean,iamkingmaker/Lean,rchien/Lean,kaffeebrauer/Lean,rchien/Lean,JKarathiya/Lean,bdilber/Lean,jameschch/Lean,devalkeralia/Lean,bizcad/Lean,StefanoRaggi/Lean,tzaavi/Lean,wowgeeker/Lean,AlexCatarino/Lean,Jay-Jay-D/LeanSTP,AnObfuscator/Lean,iamkingmaker/Lean,dalebrubaker/Lean,QuantConnect/Lean,dpavlenkov/Lean