Phil Skentelbery 05b4ff7a6b feat(phase-3): implement token endpoint and OAuth 2.0 flow ...

Phase 3 Implementation:
- Token service with secure token generation and validation
- Token endpoint (POST /token) with OAuth 2.0 compliance
- Database migration 003 for tokens table
- Authorization code validation and single-use enforcement

Phase 1 Updates:
- Enhanced CodeStore to support dict values with JSON serialization
- Maintains backward compatibility

Phase 2 Updates:
- Authorization codes now include PKCE fields, used flag, timestamps
- Complete metadata structure for token exchange

Security:
- 256-bit cryptographically secure tokens (secrets.token_urlsafe)
- SHA-256 hashed storage (no plaintext)
- Constant-time comparison for validation
- Single-use code enforcement with replay detection

Testing:
- 226 tests passing (100%)
- 87.27% coverage (exceeds 80% requirement)
- OAuth 2.0 compliance verified

This completes the v1.0.0 MVP with full IndieAuth authorization code flow.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

2025-11-20 14:24:06 -07:00

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