Platform: Support ScheduleType: "Scheduled" when creating connections via the airbyte public API

[Conall-airbyte]

Describe the feature request
If a user exports a connection definition via the airbyte API, and that connection uses ScheduleType "Scheduled", this connection cannot be imported into another airbyte instance until a different schedule type is defined, as the public API does not support this scheduletype for import, even though we use it internally.

Describe the solution you'd like
support scheduleType: "Basic" when using POST /createconnection

Describe alternatives you've considered
mutating definitions in an automated manner using a batch runner of some kind, e.g postman runner.

Additional context
as per:
https://reference.airbyte.com/reference/createconnection#custom-connections-settings

only "manual" and "cron is expected. and scheduleType: "Scheduled" is not supported via the public API.

To prove we have no compatibility on public APIs, I attempted it anyway, as below:

Below is an example of the output of "List Connections" from 1.6.1 :

{
    "data": [
        {
            "connectionId": "cdd0051a-f75b-4397-a4cb-297ad475331d",
            "name": "tf_custom_declarative_definition_example",
            "sourceId": "06983650-1686-48d6-812a-2e4b357367e3",
            "destinationId": "ecf183c8-356d-4b7a-a9e0-084265ccd0ff",
            "workspaceId": "fbeb2090-eba5-423d-aa14-3d795675375b",
            "status": "active",
            "schedule": {
                "scheduleType": "basic",
                "basicTiming": "Every 24 HOURS"
            },
            "dataResidency": "auto",
            "configurations": {
                "streams": [
                    {
                        "name": "Rates",
                        "syncMode": "full_refresh_overwrite",
                        "cursorField": [
                            "date"
                        ],
                        "primaryKey": [],
                        "selectedFields": [],
                        "mappers": []
                    }
                ]
            },
            "createdAt": 1752836557,
            "tags": [],
            "nonBreakingSchemaUpdatesBehavior": "propagate_fully",
            "namespaceDefinition": "custom_format",
            "namespaceFormat": "MY_NAMESPACE",
            "prefix": ""
        }
    ],
    "previous": "",
    "next": "https://airbyte-enterprise.conall.org/api/public/v1/connections?includeDeleted=false&workspaceIds=fbeb2090-eba5-423d-aa14-3d795675375b&limit=20&offset=20"

So we see the schedule format is:

"schedule": {
                "scheduleType": "basic",
                "basicTiming": "Every 24 HOURS"
            }

I then defined POST Create a connection as below:

{
  "sourceId": "06983650-1686-48d6-812a-2e4b357367e3",
  "destinationId": "ecf183c8-356d-4b7a-a9e0-084265ccd0ff",
  "name": "basic schedule test",
  "configurations": {
    "streams": [
      {
        "name": "Rates",
        "syncMode": "full_refresh_overwrite",
        "cursorField": [
          "date"
        ],
        "primaryKey": [],
        "selectedFields": [],
        "mappers": []
      }
    ]
  },
  "schedule": {
    "scheduleType": "basic",
    "basicTiming": "Every 24 HOURS"
  },
  "dataResidency": "auto",
  "namespaceDefinition": "custom_format",
  "namespaceFormat": "MY_NAMESPACE",
  "prefix": "",
  "nonBreakingSchemaUpdatesBehavior": "ignore",
  "status": "active"
}

Which returns:

{
    "message": "Bad Request",
    "_embedded": {
        "errors": [
            {
                "message": "Failed to convert argument [connectionCreateRequest] for value [null] due to: Cannot deserialize value of type `io.airbyte.publicApi.server.generated.models.ScheduleTypeEnum` from String \"basic\": not one of the values accepted for Enum class: [cron, manual]\n at [Source: REDACTED (`StreamReadFeature.INCLUDE_SOURCE_IN_LOCATION` disabled); line: 20, column: 21] (through reference chain: io.airbyte.publicApi.server.generated.models.ConnectionCreateRequest[\"schedule\"]->io.airbyte.publicApi.server.generated.models.AirbyteApiConnectionSchedule[\"scheduleType\"])",
                "path": "/connectionCreateRequest",
                "_embedded": {},
                "_links": {}
            }
        ]
    },
    "_links": {
        "self": {
            "href": "/api/public/v1/connections",
            "templated": false
        }
    }
}

Which confirms, this scheduleType is not supported by our public API today when creating a connection.