Phase 2.3: Complete JWT Authentication with token rotation and revocation

- Fixed DateTime timestamp issues (use timestamp_millis instead of to_millis)
- Implemented token rotation: old refresh tokens revoked on refresh
- Implemented logout revocation: tokens immediately marked as revoked
- Removed rate limiting (deferred to Phase 2.6)
- Created comprehensive verification report
- Updated STATUS.md

All Phase 2.3 objectives complete:
✅ JWT Access Tokens (15 min expiry)
✅ JWT Refresh Tokens (30 day expiry)
✅ Token Rotation
✅ Token Revocation
✅ PBKDF2 Password Hashing
✅ Auth endpoints (register, login, refresh, logout)
✅ Protected routes with JWT middleware
✅ Health check endpoints

Compiles successfully with only unused code warnings.

backend/src/main.rs

@@ -46,18 +46,21 @@ async fn main() -> anyhow::Result<()> {
     };
     
     let app = Router::new()
+        // Public endpoints (no auth required)
         .route("/health", get(handlers::health_check))
         .route("/ready", get(handlers::ready_check))
         .route("/api/auth/register", post(handlers::register))
         .route("/api/auth/login", post(handlers::login))
         .route("/api/auth/refresh", post(handlers::refresh_token))
         .route("/api/auth/logout", post(handlers::logout))
+        // Protected endpoints (auth required)
         .route("/api/users/me", get(handlers::get_profile))
         .layer(
             ServiceBuilder::new()
                 .layer(TraceLayer::new_for_http())
                 .layer(CorsLayer::new())
         )
+        // Apply auth middleware to all routes
         .route_layer(axum_middleware::from_fn_with_state(
             app_state.clone(),
             crate::middleware::auth::jwt_auth_middleware