HOLY MOTHER OF GOD IT WORKED - COPY_FROM :beers:

* The build now generates the Id,Entity table
* Using copy from method to insert to db
* 4.1 lakh records inserted under a minute
* Major bug fixed , in a dictionary always understand that if a key
* exists then it gets replace when you add new value
* Phew
Added try and except block when calcuate tfidf