- Implemented JwtAuthenticationHandler for Bearer token validation
- Created LoginEndpoint for JWT token issuance (POST /api/auth/login)
- Added JWT configuration to appsettings.json (Key, Issuer, Audience, ExpirationMinutes)
- Updated Program.cs to use JWT authentication in Release mode (replaces FailClosedAuthenticationHandler)
- Registered System.IdentityModel.Tokens.Jwt NuGet package
- Token validation includes issuer, audience, expiration, and configurable clock skew
- Backward compatible: Development mode continues to use DevelopmentHeaderAuthenticationHandler
This enables production deployments to use standard JWT-based authentication instead of rejecting all requests.
Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>
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