v0.9.0b2 - VPP battery registers swapped on SPH

Release Notes

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v0.9.0b2

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• Fix: VPP battery charge/discharge today swapped on SPH V2.01 profiles (Issue #300):
  battery_charge_today and battery_discharge_today from VPP registers 31202 and 31206
  were labelled the wrong way round on sph_3000_6000_v201 and sph_7000_10000_v201.
  VPP Protocol V2.01 specifies 31202 as daily charge and 31206 as daily discharge — the
  integration had them reversed. The legacy storage-range registers (1052/1053 and 1056/1057)
  were always correct; only the VPP-sourced entities were affected.

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v0.9.0b1

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• Fix: Universal Scanner DTC registers showing as zero on fresh TCP connection:
  When using the export_register_dump scanner, the DTC identification registers (holding
  30000 and holding 43) frequently returned 0 even though reading them individually via
  read_register always worked. Root cause: the scanner opens a new raw TCP connection, which
  displaces the coordinator's existing session. Until the inverter settles, the first reads
  return 0 with no Modbus error. Fixed by adding a 500 ms warmup delay after connecting, plus
  a single retry (with delay) for each DTC register if it reads back as zero.

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