Bas van den Aakster 51fe405440 Unified Ed25519 authentication - remove peer_id/credentials system ...

BREAKING CHANGE: Remove dual authentication system

- Remove POST /register endpoint - no longer needed
- Remove peer_id/secret credential-based auth
- All authentication now uses username + Ed25519 signatures
- Anonymous users can generate random usernames (anon-{timestamp}-{hex})

Database schema:
- Rename peer_id → username in offers table
- Rename answerer_peer_id → answerer_username in offers table
- Rename peer_id → username in ice_candidates table
- Remove secret column from offers table
- Add FK constraints for username columns

Storage layer:
- Update D1 and SQLite implementations
- All methods use username instead of peerId
- Remove secret-related code

Auth middleware:
- Replace validateCredentials() with Ed25519 signature verification
- Extract auth from request body (POST) or query params (GET)
- Verify signature against username's public key
- Validate message format and timestamp

Crypto utilities:
- Remove generatePeerId(), encryptPeerId(), decryptPeerId(), validateCredentials()
- Add generateAnonymousUsername() - creates anon-{timestamp}-{random}
- Add validateAuthMessage() - validates auth message format

Config:
- Remove authSecret from Config interface (no longer needed)

All server endpoints updated to use getAuthenticatedUsername()

2025-12-10 22:06:45 +01:00

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