v5.4.0 – Architecture rewrite & UX improvements

What's new in v5.4.0

Architecture

• Event-driven debouncer: batches rapid P1 meter updates, reducing HA event-loop pressure ~9×
• Sensors hold direct Python references to dependencies (no sibling sensor state bus lookups)
• Entry-scoped unique IDs — multiple installations never collide

Setup wizard

• 8 steps (down from 9) — electricity and gas contract dates combined in one step
• Separate contract start dates for electricity and gas
• Gas current meter reading is now required (prevents negative consumption values)
• All number fields use text box mode (no more sliders)
• Step progress shown in every title (Step X of 8)

Bug fixes

• Invalid entity ID warning fixed (entry ID lowercased)
• Options flow fixed for HA 2024+ (no-argument OptionsFlow)
• Options menu labels now display correctly
• translations/en.json added (frontend label fix)
• Sensor units cleaned up (no more /year or /month suffixes)
• Automatic entity registry migration from v1 → v2 (dashboard cards preserved)