Adding ReadSubFingerprintDataByHashBucketsThresholdWithGroupId method to SQL and RAM model services. This one will be usefull to read query only those hash-buckets that correspond to a specific group of tracks identified by the parameter.
Removing TrackId from HashTables. Research and tests has shown that it is not required. It can easily be obtained with a simple join on subfingerprints if required (hashtables contain subfingerprints id).