[Architecture] Distributed trust system with verification tiers

[Ikalus1988]

Task

Formalize trust tiers: GitHub-verified > email-verified > web-verified > anonymous.

Acceptance Criteria

• Machine-readable config: misaka-protocol.json trust section
• Each contributor has a trust tier based on verification method
• Search results can be filtered by contributor trust tier
• Higher trust = higher base quality score
• Documentation: trust tier definitions + how to upgrade

Why it matters

Trust determines lesson quality. Anonymous lessons need verification; GitHub-verified ones are inherently more trustworthy.

Difficulty

🔴 Ring-4 — governance + security architecture.

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