s3 source stream doesn't have cursor field defined

I am trying out PyAirbyte and have configured the below script with credentials that work fine in airbyte cloud. I'm passing all of the config spec checks, but I keep getting an error. The logs appear to show that the streams cursor is not defined, but i don't see any place to specify the cursor in the config schema and in airbyte cloud it appears the cursor is implicilty the modified date associated with the file in the s3 bucket.

Here is my script (with parts redacted):
```
import airbyte as ab

source = ab.get_source("source-s3")
source.set_config(
{
"bucket": "REDACTED",
"aws_access_key_id": "REDACTED",
"aws_secret_access_key": "REDACTED",
"streams": [
{
"name": "all data",
"globs": ["**/REDACTED*.csv"],
"start_date": "2020-01-01T00:00:00.000000Z",
"format": {
"filetype": "csv",
},
"primary_key": "REDACTED",
}
],
}
)
source.check()
# source.print_config_spec(output_file="./source.yml")

destination = ab.get_destination("destination-mysql")
destination.set_config(
{
"database": "REDACTED",
"host": "REDACTED",
"password": "REDACTED",
"port": 3306,
"username": "REDACTED",
}
)
destination.check()
# destination.print_config_spec(output_file="./destination.yml")
destination.write(source)
```

and here is the error I am getting in the logfiles:

2025-01-15 09:06:31 - INFO - ERROR main i.a.c.i.b.s.SshWrappedDestination(getSerializedMessageConsumer):136 Exception occurred while getting the delegate consumer, closing SSH tunnel java.lang.NullPointerException: Cannot invoke "java.util.List.size()" because the return value of "io.airbyte.protocol.models.v0.ConfiguredAirbyteStream.getCursorField()" is null
at io.airbyte.integrations.base.destination.typing_deduping.CatalogParser.toStreamConfig(CatalogParser.kt:134) ~[airbyte-cdk-typing-deduping-0.33.0.jar:?]
at io.airbyte.integrations.base.destination.typing_deduping.CatalogParser.parseCatalog(CatalogParser.kt:29) ~[airbyte-cdk-typing-deduping-0.33.0.jar:?]
at io.airbyte.cdk.integrations.destination.jdbc.AbstractJdbcDestination.getV2MessageConsumer(AbstractJdbcDestination.kt:294) ~[airbyte-cdk-db-destinations-0.33.0.jar:?]
at io.airbyte.cdk.integrations.destination.jdbc.AbstractJdbcDestination.getSerializedMessageConsumer(AbstractJdbcDestination.kt:264) ~[airbyte-cdk-db-destinations-0.33.0.jar:?]
at io.airbyte.cdk.integrations.base.ssh.SshWrappedDestination.getSerializedMessageConsumer(SshWrappedDestination.kt:130) [airbyte-cdk-core-0.33.0.jar:?]
at io.airbyte.cdk.integrations.base.IntegrationRunner.runInternal(IntegrationRunner.kt:208) [airbyte-cdk-core-0.33.0.jar:?]
at io.airbyte.cdk.integrations.base.IntegrationRunner.run(IntegrationRunner.kt:116) [airbyte-cdk-core-0.33.0.jar:?]
at io.airbyte.integrations.destination.mysql.MySQLDestination$Companion.main(MySQLDestination.kt:234) [io.airbyte.airbyte-integrations.connectors-destination-mysql.jar:?]
at io.airbyte.integrations.destination.mysql.MySQLDestination.main(MySQLDestination.kt) [io.airbyte.airbyte-integrations.connectors-destination-mysql.jar:?]