CQube Improvements

[tushar5526]

• Postman Collection shared on Sunbird's Website is not updated. Some endpoints are not right.
• [RFC] Remove hardcoded Grammar files from CQube and insert them also via APIs
• No API to add grammar files via API to onboard new programs
• No API to update config.json, adding a new program requires modifying config.json as well which has to be done manually on the GH repo.
• Current Process to onboard programs is manual - Creating a fork and then updating the repo - Difficult to keep the project in sync with future releases.
• Skip creating index if not speicifed #169
• CSVs might have ^M at their ends which should be stripped, otherwise reading that row from CSV fails. The last line of data files is not being read possibly due to ^M or a new line error (solved in newer versions)
• Error if no “Index” is specified in a dimension grammar. #168
• CQube is not able to process 17L rows in one go, 4L rows are working fine but got a memory heap error.
• [Dev Experience] Raw query failed. Code: 23503. Message: insert or update on the table "pal_total_usage_yearly_district" violates foreign key constraint "fk_district_name" (Also log the row to help debug faster)
• API server to be upgraded to handle large files. Files with huge sizes are getting dropped while ingesting via APIs. Probably nginx headers have to be configured.