Differenate pending service checks from ok

[wbollock]

Currently, pending service checks are reported in the same manner as ok checks. Offhand, this is probably because current_state is 0 for both.

The servicestatus API endpoint seemingly has no way to differentiate these.

    # PASSIVE, OK
    {
        "host_name": "redacted",
        "service_description": "redacted",
        "display_name": "redacted",
        "host_object_id": "1771",
        "host_address": "redacted",
        "host_alias": "redacted",
        "icon_image": "",
        "icon_image_alt": "",
        "notes": "",
        "notes_url": "",
        "action_url": "",
        "servicestatus_id": "1143",
        "instance_id": "1",
        "service_object_id": "3009",
        "status_update_time": "2022-09-13 09:43:30",
        "output": "",
        "long_output": "",
        "perfdata": "",
        "current_state": "0",
        "has_been_checked": "0",
        "should_be_scheduled": "0",
        "current_check_attempt": "1",
        "max_check_attempts": "2",
        "last_check": "1969-12-31 19:00:00",
        "next_check": "1969-12-31 19:00:00",
        "check_type": "0",
        "check_options": "0",
        "last_state_change": "1969-12-31 19:00:00",
        "last_hard_state_change": "1969-12-31 19:00:00",
        "last_hard_state": "0",
        "last_time_ok": "1969-12-31 19:00:00",
        "last_time_warning": "1969-12-31 19:00:00",
        "last_time_unknown": "1969-12-31 19:00:00",
        "last_time_critical": "1969-12-31 19:00:00",
        "state_type": "1",
        "last_notification": "1969-12-31 19:00:00",
        "next_notification": "1969-12-31 19:00:00",
        "no_more_notifications": "0",
        "notifications_enabled": "1",
        "problem_has_been_acknowledged": "0",
        "acknowledgement_type": "0",
        "current_notification_number": "0",
        "passive_checks_enabled": "1",
        "active_checks_enabled": "0",
        "event_handler_enabled": "1",
        "flap_detection_enabled": "1",
        "is_flapping": "0",
        "percent_state_change": "0",
        "latency": "0",
        "execution_time": "0",
        "scheduled_downtime_depth": "0",
        "failure_prediction_enabled": "0",
        "process_performance_data": "1",
        "obsess_over_service": "0",
        "modified_service_attributes": "0",
        "event_handler": "",
        "check_command": "stale_check",
        "normal_check_interval": "5",
        "retry_check_interval": "1",
        "check_timeperiod_object_id": "246"
    }


    # PASSIVE, PENDING
    {
        "host_name": "redacted",
        "service_description": "redacted",
        "display_name": "redacted",
        "host_object_id": "77254",
        "host_address": "127.0.0.1",
        "host_alias": "127.0.0.1",
        "icon_image": "",
        "icon_image_alt": "",
        "notes": "",
        "notes_url": "",
        "action_url": "",
        "servicestatus_id": "67477",
        "instance_id": "1",
        "service_object_id": "77363",
        "status_update_time": "2022-09-13 09:43:30",
        "output": "",
        "long_output": "",
        "perfdata": "",
        "current_state": "0",
        "has_been_checked": "0",
        "should_be_scheduled": "0",
        "current_check_attempt": "1",
        "max_check_attempts": "1",
        "last_check": "1969-12-31 19:00:00",
        "next_check": "1969-12-31 19:00:00",
        "check_type": "0",
        "check_options": "0",
        "last_state_change": "1969-12-31 19:00:00",
        "last_hard_state_change": "1969-12-31 19:00:00",
        "last_hard_state": "0",
        "last_time_ok": "1969-12-31 19:00:00",
        "last_time_warning": "1969-12-31 19:00:00",
        "last_time_unknown": "1969-12-31 19:00:00",
        "last_time_critical": "1969-12-31 19:00:00",
        "state_type": "1",
        "last_notification": "1969-12-31 19:00:00",
        "next_notification": "1969-12-31 19:00:00",
        "no_more_notifications": "0",
        "notifications_enabled": "1",
        "problem_has_been_acknowledged": "0",
        "acknowledgement_type": "0",
        "current_notification_number": "0",
        "passive_checks_enabled": "1",
        "active_checks_enabled": "0",
        "event_handler_enabled": "1",
        "flap_detection_enabled": "1",
        "is_flapping": "0",
        "percent_state_change": "0",
        "latency": "0",
        "execution_time": "0",
        "scheduled_downtime_depth": "0",
        "failure_prediction_enabled": "0",
        "process_performance_data": "1",
        "obsess_over_service": "0",
        "modified_service_attributes": "0",
        "event_handler": "",
        "check_command": "stale_check",
        "normal_check_interval": "60",
        "retry_check_interval": "1",
        "check_timeperiod_object_id": "246"
    }