- Change file mode from 644 to 755 for all project files
- Add chain_id parameter to get_balance RPC endpoint with default "ait-devnet"
- Rename Miner.extra_meta_data to extra_metadata for consistency
- Add POST /api/v1/miners/{miner_id}/jobs endpoint for listing miner-assigned jobs with filtering
- Add POST /api/v1/miners/{miner_id}/earnings endpoint for miner earnings tracking (mock implementation)
- Add PUT /api/v1/miners/{miner_id}/capabilities endpoint for updating miner capabilities
- Add DELETE /api/v1/miners/{miner_id} endpoint for miner deregistration (sets OFFLINE status)
- Add JobService.fail_job()
