This PR introduces significant improvements to the pool's data tracking and dashboard visualization.

Changes & Enhancements:

• New MongoDB database: yadacoinpool to separate pool statistics from the node database.
• New collection: pool_hashrate_stats for storing real-time pool hashrate, network hashrate, miners, and difficulty over time.
• Indexes for performance:
  • time index for efficient querying
  • date index with TTL (25 hours) for automatic data cleanup
• New dashboard charts:
  • Pool Hashrate & Miners: Displays pool hashrate, miners count, and workers count.
  • Network Hashrate & Difficulty: Shows network difficulty and hashrate trends.
• Improved latest block reward display:
  • Now based on real transaction data instead of static calculations.
  • Includes separate values for miners and masternodes.
  • Displays reward per masternode.

Benefits:

• Improved pool performance with dedicated stats storage.
• Cleaner database with automatic TTL-based log management.
• Real-time data visualization with accurate reward calculations.

This update ensures a more efficient, scalable, and informative mining pool dashboard.