Resample is not timezone aware about lovelace-plotly-graph-card HOT 2 OPEN

For the record, this is about using home assistant in a non gmt-0 time zone (not using time offset)

from lovelace-plotly-graph-card.

Plotly graph certainly looks nicer than Apexchart version, but one of the data series is not being interpreted correctly.
Coloured bars are from source in UTC with "Z" notation, the grey bars that they overlay are from an adjusted source (+1:00). Plotly isn't respecting the timezone. Everything else in config looks the same.

- start_time: '2024-04-03T16:00:00+01:00'
  end_time: '2024-04-03T17:00:00+01:00'
  price_pence_per_kwh: 6.604500000000001

- start: '2024-04-03T15:00:00+00:00'
  end: '2024-04-03T15:30:00+00:00'
  value_inc_vat: 0.247485
- start: '2024-04-03T15:30:00+00:00'
  end: '2024-04-03T16:00:00+00:00'
  value_inc_vat: 0.26271

from lovelace-plotly-graph-card.