Quantile Aggregator Plugin configuration not parsed correctly

Plugin Configuration:

```yaml
- quantile:
name_suffix: _quantile
namepass:
- consumer_events
- azure_events
period: 60s
drop_original: true
quantiles:
- 0.99
```

_helpers.tpl converts float64 numbers to int64, changing all quantiles values to 0.

```yaml
- quantile:
name_suffix: _quantile
namepass:
- consumer_events
- azure_events
period: 60s
drop_original: true
quantiles:
- 0
```

Telegraf fails to start because it expects a floating number.

Locate _helpers.tpl and trace how the quantile plugin configuration is rendered from YAML. Verify the conversion preserves floating-point values such as 0.99 rather than converting them to integers, then confirm the rendered Telegraf configuration starts successfully with the provided quantile settings.

Written by the indexing model from the issue text.