Create user reputation score model seeded from reporting behavior

[S-Mubarak]

Description

Reputation is central to trust and future queue buddy flows, but currently exists only as architecture notes.

Scope

• Add off-chain reputation profile and scoring inputs
• Compute basic trust score from report consistency, volume, and recency
• Store score refresh timestamps and explanatory factors

Acceptance Criteria

• Each user has a calculable reputation score
• Score changes when reporting behavior changes
• Profile exposes enough factors for UI explanation

Dependencies

Blocked by: #101
Blocked by: #103

Stack

Express

[ciynthia]

@ciynthia has applied to work on this issue as part of the Stellar Wave Program's 3rd wave.

Good day. I would like to work on this issue. Please assign

ℹ️ Repo Maintainers: To accept this application, review their application or assign @ciynthia to this issue.