v2.0.3

Bug fixes

• Polling switch: correct state shown on startup (enabled by default); no longer always appears as off
• Polling switch: enabled/disabled preference persisted in HA — survives restart
• Polling timeout: value persisted in HA — survives restart
• Polling timeout: sent to reader immediately even when polling is disabled, so it is up to date when polling is re-enabled
• Removed unnecessary set_polling(false/true) calls around reader reconfiguration