BUG: Leaderboard API showing stale data inconsistent with metagraph state

[Luka-Loncar]

Description:

An issue was discovered where the leaderboard API was returning outdated or incorrect data that didn't match the current metagraph state. This manifested as agents showing incorrect emissions values and deregistered agents still appearing in the rankings.

Observed Behavior:

• Leaderboard showed a deregistered agent (rank build(deps): bump starlette from 0.37.2 to 0.40.0 #1) as still active
• Emissions values displayed didn't match metagraph data
• API was returning stale/incorrect data
• Issue resolved unexpectedly after UI redeployment, though this should not affect API behavior
• After resolution, entire leaderboard updated simultaneously rather than gradually

Expected Behavior:

• Leaderboard should accurately reflect current metagraph state
• Emissions values should match on-chain data
• Deregistered agents should not appear in rankings
• Updates should process gradually through validator sync cycle

Potential Investigation Areas:

1. API caching mechanisms
2. Validator update processes
3. Data synchronization between metagraph and API
4. Database state management
5. Service deployment impact analysis

Impact:

• Incorrect ranking display affecting user trust
• Misrepresented emissions data
• Potential confusion in community regarding agent status