[Enhancement] Implement Telos Voting System Improvements

🔄 Description
Implement three key changes to the Telos voting system to improve decentralization and BP incentives: decay mechanism, tiered BP pay, and self-stake boost.

📋 Key Features

• Implement vote decay multiplier for both EVM and native chains
• Create tiered BP payment structure replacing the current 2-tier system
• Add self-stake boost to incentivize BP skin-in-the-game

🧠 Tasks

• Vote Decay Implementation

  • Add decay multiplier to native sys contracts before deployment - there's already code for this, it was removed. It needs to be reviewed. We want to make it configurable so decay should be stored in a table.
  • Implement as multiplier against new votes (not reducing old vote weight)
  • Add to native side with configurable multiplier (default to 1)
  • There is another value: amount that the decay value will increase over a time period
  • This needs to be replicated on EVM so implementation on native should be compatible with evm implementation
  • Create action to sync EVM decay multiplier with native chain

• Tiered BP Pay Structure

  • Replace current 2-tier system (1-21 full pay, 22-42 half pay)
  • Implement hardcoded list of 42 pay multipliers
  • Modify "to_producers" amount distribution logic
  • Reuse existing "shares" logic where applicable

• Self-Stake Boost

  • Implement check for BP's stake to itself (rex or regular stake)
  • Apply self-stake multiplier (likely 10x) to BP's own votes
  • Apply boost after standard vote calculation but before decay multiplier
  • Ensure compatibility with existing DPOS voting mechanism

🔍 Technical Details

• Decay is implemented as a multiplier against new votes only
• BP pay uses 42 different payment tiers rather than formula-based calculation
• Self-stake boost adds (BP's stake × multiplier) to their vote weight

⏱️ Timeline

• Decay mechanism: Future proposal
• Self-stake and tiered pay: Include in current planned updates
• Consolidate all changes into single upgrade/testing/audit cycle

🔗 References

• Telos governance proposal (link TBD)
• Current EOSIO voting mechanism documentation
• https://github.com/guilledk/telos.contracts/blob/3df658aa44b2cf169064489b4563043112affd43/contracts/telos.gpu/include/telos.gpu/utils.hpp#L19