BCIP-7: Increase data integrity via the number of external calls to data sources

Band Protocol continues to expand the supply of data on its platform which reinforces the data integrity. More data providers mean more options for users to pick the source they want, and more redundancy to safeguard against malicious actions from the data provider end. The parameter max_raw_request_count sets the upper limit of how many external calls to data source a request can make, limiting the number of sources that one request can include.