Reolink E1 Zoom siren entity does not trigger physical siren (works fine from official Reolink app)

### The problem

- Model: Reolink E1 Zoom
- Firmware: v3.2.0.4741_2503281992
- Hardware: IPC_NT14NA48MPSD6
- Integration entry created via standard config flow (RTSP), siren._sirena entity is created and reports supported_features: 27
- Calling siren.turn_on on this entity produces no audible alarm and the entity state stays stuck on unknown (never transitions to on)
- The siren/alarm does work correctly when triggered from the official Reolink mobile app on the same physical camera — confirms this is not a hardware limitation, but an integration-side command/response issue
- Camera reports "siren" and "siren_play" in its capability list (GetAiCfg/abilities dump), so the ability flag is present but the command apparently isn't reaching the device correctly, or the response isn't parsed

[reolink_e1zoom_diagnostics.json](https://github.com/user-attachments/files/32007308/reolink_e1zoom_diagnostics.json)

[reolink_e1zoom_siren_bug_report.txt](https://github.com/user-attachments/files/32007313/reolink_e1zoom_siren_bug_report.txt)

### What version of Home Assistant Core has the issue?

core-2026.9.1

### What was the last working version of Home Assistant Core?

_No response_

### What type of installation are you running?

Home Assistant OS

### Integration causing the issue

Reolink

### Link to integration documentation on our website

_No response_

### Diagnostics information

_No response_

### Example YAML snippet

```yaml

```

### Anything in the logs that might be useful for us?

```txt

```

### Additional information

_No response_