A user (on 7.17.7) reported to me a situation where they were attempting to delete a snapshot and would get the log message `deleting snapshots [snapshot-test] from repository [my-snapshots]` but then no further messages at `INFO` or above; enabling some internal logging indicated some low-level timeouts:

```
[DEBUG][com.amazonaws.latency    ] [instance-0123456789] MaxRetriesExceeded=[true], ServiceName=[Amazon S3], ServiceEndpoint=[https://REDACTED/], Exception=[java.net.SocketTimeoutException: Read timed out, java.net.SocketTimeoutException: Read timed out, java.net.SocketTimeoutException: Read timed out, java.net.SocketTimeoutException: Read timed out],...
```

This was enough for the user to go and investigate some performance issues in their repository, but I find the lack of logging concerning. Eventually the cluster state contains no ongoing snapshot deletion, but there is nothing in the logs to indicate that anything didn't work. The deletion API request had already timed out by this point so we can't return an error that way either. I'm opening this issue to make sure we investigate the missing logging.
server/src/main/java/org/elasticsearch/snapshots/SnapshotsService.java
}
        }
        return builder.build();
    }
    /**
     * Compute the snapshot status for a given shard based on the current primary routing entry for the shard.
     *
     * @param shardRepoGeneration repository generation of the shard in the repository
     * @param primary             primary routing entry for the shard
     * @return                    shard snapshot status
     */
    private static ShardSnapshotStatus initShardSnapshotStatus(ShardGeneration shardRepoGeneration, ShardRouting primary) {
        ShardSnapshotStatus shardSnapshotStatus;
        if (primary == null || primary.assignedToNode() == false) {
            shardSnapshotStatus = new ShardSnapshotStatus(null, ShardState.MISSING, "primary shard is not allocated", shardRepoGeneration);
        } else if (primary.relocating() || primary.initializing()) {
            shardSnapshotStatus = new ShardSnapshotStatus(primary.currentNodeId(), ShardState.WAITING, shardRepoGeneration);
        } else if (primary.started() == false) {
            shardSnapshotStatus = new ShardSnapshotStatus(
                primary.currentNodeId(),
                ShardState.MISSING,
                "primary shard hasn't been started yet",
                shardRepoGeneration
            );
        } else {
            shardSnapshotStatus = new ShardSnapshotStatus(primary.currentNodeId(), shardRepoGeneration);
        }
        return shardSnapshotStatus;
    }
    /**