Enforce match-only direct messages

[jongan69]

Summary

• authorize kind 1059 direct-message publishes using the authenticated sender and public recipient tag
• allow only active matches and self archive copies
• fail closed for blocks and policy lookup errors

Validation

• npx vitest run tests/opendating/integration/services.test.ts (21 passed)
• npm run typecheck
• npm run lint (existing warnings only)

[coderabbitai]

Important

• 🔍 Trigger review

This repository does not receive automatic reviews because it has fewer than 10 stars.

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: ef019190-dec5-4394-864c-d857b88b3478

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