Move file CIK ticker parsing logic to `Process` method
Move file CIK ticker parsing logic to `Process` method

AlexCatarino/Lean,JKarathiya/Lean,jameschch/Lean,AlexCatarino/Lean,StefanoRaggi/Lean,jameschch/Lean,QuantConnect/Lean,jameschch/Lean,StefanoRaggi/Lean,StefanoRaggi/Lean,AlexCatarino/Lean,JKarathiya/Lean,QuantConnect/Lean,AlexCatarino/Lean,StefanoRaggi/Lean,JKarathiya/Lean,QuantConnect/Lean,QuantConnect/Lean,jameschch/Lean,StefanoRaggi/Lean,jameschch/Lean,JKarathiya/Lean