WIP: Handle retry-after header

[tellet-q]

Add support for following responses from Qdrant:

Rate limiter hit for gRPC: qdrant/qdrant#6072

Usage example for strict mode ("read_rate_limit": 60, "write_rate_limit": 60):

package org.example;

import io.grpc.StatusRuntimeException;
import io.qdrant.client.QdrantClient;
import io.qdrant.client.QdrantGrpcClient;
import io.qdrant.client.ResourceExhaustedException;
import io.qdrant.client.grpc.Points;

import java.util.List;
import java.util.concurrent.ExecutionException;

public class Main {
    public static void hitRateLimit(QdrantClient qClient) {
        System.out.println("start hitRateLimit");
        for (int i = 0; i < 100; i++) {
            try {
                List<Points.ScoredPoint> points =
                  qClient
                    .searchAsync(
                      Points.SearchPoints.newBuilder()
                        .setCollectionName("benchmark")
                        .addAllVector(List.of(0.6235f, 0.123f, 0.532f, 0.123f))
                        .setLimit(5)
                        .build())
                    .get();
            } catch (ExecutionException | InterruptedException | StatusRuntimeException e) {
                    System.out.println("Exception caught: " + e.getMessage());
                    if (e.getCause() instanceof ResourceExhaustedException) {
                        ResourceExhaustedException ex = (ResourceExhaustedException) e.getCause();
                        System.out.println("hitRateLimit! retry after" + ex.getRetryAfterSeconds());
                        break;
                    }
                    break;
                }
        }
        System.out.println("done hitRateLimit");
    }

    public static void main(String[] args) {
        QdrantClient client = new QdrantClient(QdrantGrpcClient.newBuilder("localhost", 6334, false, true).build());

        String collectionName = "benchmark";

        try {
            client.healthCheckAsync().get();
            boolean collectionExists = client.collectionExistsAsync(collectionName).get();

            if (collectionExists) {
                System.out.println("Collection exists: " + collectionName);
            } else {
                System.out.println("Collection does not exist: " + collectionName);
            }
        } catch (Exception e) {
            System.err.println("Error checking collection: " + e.getMessage());
        }

        hitRateLimit(client);
    }
}