InfluxDB 3 serverless: write operation fails with “Error 403 data outside of the retention period"

Hi everyone,

I am using InfluxDB 3 Serverless.
These days I am setting up the write operation to my InfluxDB cloud instance using the newer python client for influxdb 3 [InfluxDB3-python-client](https://github.com/InfluxCommunity/influxdb3-python).

Through the web portal I have set the option “Delete data” to Never to the bucket I am attempting to write in, in order to not have any retention policy restriction.

Despite this, I keep getting the error below if I try to write data having timestamp values older than one year from now.

```
Error exception: (403)
Reason: Forbidden
HTTP response headers: HTTPHeaderDict({'Date': 'Thu, 01 Feb 2024 11:05:48 GMT', 'Content-Type': 'application/json', 'Content-Length': '239', 'Connection': 'keep-alive', 'trace-id': '92d9f2d97d2ea1fb', 'trace-sampled': 'false', 'Strict-Transport-Security': 'max-age=15724800; includeSubDomains', 'X-Influxdb-Request-ID': '60b399b4b7d33412a6a141ecec08d27f', 'X-Influxdb-Build': 'Cloud'})
HTTP response body: {"code":"forbidden","message":"dml handler error: data in table Test is outside of the retention period: minimum acceptable timestamp is 2023-07-30T11:05:48.178479165+00:00, but observed timestamp 2022-04-04T05:40:41.079+00:00 is older."}
```

It seems like the minium timestamp accepted corresponds to the initial retention period I have set when the bucket was created for the first time which indeed was 6 months period.
Another detail: the bucket was initially created with HTTP API ([Influx OSS API](https://docs.influxdata.com/influxdb/v2/api/)).

Here is the output from command line verification ` influx bucket list`:

```
{
"createdAt": "2024-01-31T13:29:16.934100615Z",
"description": "create bucket ",
"id": "",
"labels": [],
"links": {
"labels": "/api/v2/buckets/##/labels",
"members": "/api/v2/buckets/##/members",
"org": "/api/v2/orgs/##",
"owners": "/api/v2/buckets/##/owners",
"self": "/api/v2/buckets##",
"write": "/api/v2/write?org=##"
},
"name": "",
"orgID": "",
"retentionRules": [],
"rp": "0",
"schemaType": "implicit",
"type": "user",
"updatedAt": "2024-02-01T12:40:51.625915707Z"
},
```

retentions rules looks empty, which means infinite time retention as I guess. Correct me If I am wrong.

Do you guys have any suggestion where to look?
Do you think it is a default limitation? In this case, I couldn’t find where it is specified.

Thanks,
Nick

Start by reproducing the older-timestamp write with the InfluxDB3 Python client, then compare it with the bucket details from `influx bucket list` and the HTTP API configuration. Determine whether the retention-period rejection is expected for this serverless bucket; done means identifying the responsible setting or behavior and documenting the required fix or explanation.

Written by the indexing model from the issue text.