fix: add test endpoint and fix ALTCHA route registration

- Add simple test endpoint to verify routing works
- Register both auth and admin ALTCHA challenge endpoints
- Use consistent routing pattern for both endpoints

go-backend/cmd/api/main.go

@@ -261,8 +261,14 @@ func main() {
 			auth.POST("/reset-password", authHandler.ResetPassword)
 		}
 
+		// Test endpoint to verify routing
+		r.GET("/api/v1/test", func(c *gin.Context) {
+			c.JSON(200, gin.H{"message": "Route test successful"})
+		})
+
 		// ALTCHA challenge endpoint (no rate limiting)
 		v1.GET("/auth/altcha-challenge", authHandler.GetAltchaChallenge)
+		r.GET("/api/v1/admin/altcha-challenge", adminHandler.GetAltchaChallenge)
 
 		authorized := v1.Group("")
 		authorized.Use(middleware.AuthMiddleware(cfg.JWTSecret, dbPool))