*/
public class LlmException extends FessSystemException {

    private static final long serialVersionUID = 1L;

    /** Error code for rate limit (HTTP 429). */
    public static final String ERROR_RATE_LIMIT = "rate_limit";

    /** Error code for authentication failure (HTTP 401/403). */
    public static final String ERROR_AUTH = "auth_error";

    /** Error code for service unavailable (HTTP 502/503). */

        assertEquals(LlmException.ERROR_AUTH, exception.getErrorCode());
        assertSame(cause, exception.getCause());
    }

    @Test
    public void test_errorCodeConstants() {
        assertEquals("rate_limit", LlmException.ERROR_RATE_LIMIT);
        assertEquals("auth_error", LlmException.ERROR_AUTH);
        assertEquals("service_unavailable", LlmException.ERROR_SERVICE_UNAVAILABLE);

						evaluate: '<la:message key="labels.chat_phase_evaluate" />',
						fetch: '<la:message key="labels.chat_phase_fetch" />',
						answer: '<la:message key="labels.chat_phase_answer" />'
					},
					errors: {
						rate_limit: '<la:message key="labels.chat_error_rate_limit" />',
						auth_error: '<la:message key="labels.chat_error_auth" />',
						service_unavailable: '<la:message key="labels.chat_error_service_unavailable" />',

						evaluate: '<la:message key="labels.chat_phase_evaluate" />',
						fetch: '<la:message key="labels.chat_phase_fetch" />',
						answer: '<la:message key="labels.chat_phase_answer" />'
					},
					errors: {
						rate_limit: '<la:message key="labels.chat_error_rate_limit" />',
						auth_error: '<la:message key="labels.chat_error_auth" />',
						service_unavailable: '<la:message key="labels.chat_error_service_unavailable" />',

                evaluate: 'Evaluating results...',
                fetch: 'Retrieving content...',
                answer: 'Generating answer...'
            },
            errors: {
                rate_limit: 'It\'s currently busy. Please wait a moment and try again.',
                auth_error: 'AI service authentication failed. Please contact the administrator.',

) -> list[DiscussionsEdge]:
    with rate_limiter:
        data = get_graphql_response(
            settings=settings,
            query=discussions_query,
            after=after,
            category_id=questions_category_id,
        )

    rate_limiter.update_request_info(
        cost=data["data"]["rateLimit"]["cost"],
        remaining=data["data"]["rateLimit"]["remaining"],

- github.com/envoyproxy/go-control-plane/envoy: [v1.32.4](https://github.com/envoyproxy/go-control-plane/tree/envoy/v1.32.4)
- github.com/envoyproxy/go-control-plane/ratelimit: [v0.1.0](https://github.com/envoyproxy/go-control-plane/tree/ratelimit/v0.1.0)
- github.com/go-jose/go-jose/v4: [v4.0.4](https://github.com/go-jose/go-jose/tree/v4.0.4)
- github.com/golang-jwt/jwt/v5: [v5.2.2](https://github.com/golang-jwt/jwt/tree/v5.2.2)