Implement Real Tokenomics based on Network Contributions

[iberi22]

This refactor replaces the mathematical placeholder ProofOfSentience with a data-driven tokenomics system.

Key changes:

1. Domain Logic: Added NodeContribution and a new RewardEngine in synapse-core that calculates rewards based on weighted metrics: Storage (30%), Bandwidth (40%), Uptime (20%), and Replication (10%), including an inactivity penalty.
2. Infrastructure: Enhanced LibP2PEmpathyAdapter to measure actual bytes served and stored. Added a bridge method to feed these metrics into the reward engine.
3. Consistency: Renamed 'Proof of Sentience' to 'Node Score' throughout the codebase (traits, CLI, adapters) to align with the new contribution-based model.
4. Stability: Updated various mock implementations and test configurations to maintain a clean build environment.

Fixes #797

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PR created automatically by Jules for task 12662286266512326650 started by @iberi22

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