Extend existing C# service

Based on a currently running service which already has access to necessary databases we need the following: 1. During service execution: Only send updates for markets when bit column isActive = 1 2. Upon service startup: export all available markets and their details to a json file (based on the example in the sample app). Location of output file to be based on a setting in the main config file. 3. During output to Redis servers: For output to the channel, use a format string instead of simply writing the symbol. Maintain the raw format string in the database as is currently done with the string used for the message. The same fields are to be available for both the channel format string and the message format string. (During this process use ["MessageWriteFormat"] where it is currently ["ChannelWriteFormat"] to write message data, then use the new format string, ["ChannelWriteFormat"], for writing the channel data.) The following fields should be available to the format strings: {0} = symbol {1} = date {2} = price