Native asset values task 2

[shrnkld]

Description:
Update the EventProcessorStageExchange_Bundle class to calculate token prices in terms of native assets and store them in the newly created TokenPrice table.

To do:

• Modify the _process() method to calculate token prices in terms of native assets using the bundle table data.
• Implement parallel processing using multiple worker threads for additional token price calculations.
• Update the class to accept a token_pairs parameter.
• Update the _process() method to handle calculations for multiple token pairs.
• Store calculated prices in the TokenPrice table.
• Leverage Redis cache to avoid redundant calculations.