WriteApi does not respect Ctrl+C / KeyboardInterrupt / SIGTERM

Dieses Issue hat noch niemand übernommen.

### Specifications

* Client Version: 1.48.0
* InfluxDB Version: 2.4.0
* Platform: Ubuntu 24.04

### Code sample to reproduce problem

1. Make sure there is no server running at the address below.
2. Run the following program
```python
import urllib3
from influxdb_client.client.influxdb_client import InfluxDBClient
from influxdb_client.client.write.point import Point

_RETRIES = urllib3.util.Retry(total=6, backoff_factor=0.8)
p = Point("dsjfsfd")
with InfluxDBClient("http://127.0.0.1:8086", org="fake", retries=_RETRIES) as client:
with client.write_api() as api:
api.write("mybucket", client.org, p)

```
3. Wait a second or two to make sure at least one attempt has been made.
4. Press **Ctrl+C** (or send a `SIGTERM` through some other mechanism, eg `kill` utility on linux)

### Expected behavior

`api.__exit__` should raise a `KeyboardInterrupt` exception immediately.

### Actual behavior

Program is stuck running for several minutes inside `api.__exit__`. Until program is force killed using `SIGKILL` or all retries have been exhausted.

### Additional info

I've also experimented with `write_options=WriteOptions(max_close_wait=1000)` but it does not help and it has the risk to affect the normal flow when user is not pressing Ctrl+C

Start with the client.write_api() entry point and the InfluxDBClient usage shown in influxdb_client/client/influxdb_client.py. Reproduce the no-server case, then trace api.__exit__ during Ctrl+C or SIGTERM; done means shutdown raises KeyboardInterrupt promptly instead of waiting for retries to finish.

Vom Indexierungsmodell aus dem Issue-Text verfasst.