v0.26.3

Changed

• Migrate 15 device handlers to shared helpers in devices/base.py (dimmer, door_contact, flood_detector, hub, life_quality, lightswitch, manual_call_point, motion_detector, siren, smoke_detector, socket, transmitter, waterstop — on top of the 4 already done in 0.26.2). Removes ~500 lines of duplicated battery/signal/tamper/temperature/firmware sensor boilerplate.
• Extract EventHandlerMixin in _event_helpers.py: SSE and SQS managers now share the same implementation of _find_video_edge, _update_video_detection and _reset_doorbell_ring (-196 lines of duplication).
• coordinator.py: cache space_binding per hub so async_get_space_by_hub is only hit on full_refresh (not on every poll tick); motion-reset error path drops the unparsable motion_detected_at instead of spamming a WARNING every tick.
• event_codes.py: extend EVENT_MESSAGES to all 7 supported languages (de/nl/sv/uk added) — 861 messages total, up from fr/en/es only.
• Extend entity.camera.nvr_channel / nvr_channel_sub translation keys so untitled NVR channels follow the user's HA language (7 languages).

Fixed

• camera.py: guard snapshot cache with an asyncio.Lock so two concurrent requests can no longer spawn two FFmpeg processes against the same RTSP stream.
• __init__.py: add async_remove_config_entry_device so users can delete orphaned Ajax devices (e.g. entities removed by previous releases) from the registry; redact sensitive fields before writing ajax_raw_devices.json; escape markdown in persistent-notification source/space names to neutralise [text](javascript:…) injection.
• api.py: bound aiohttp connector pool (limit=20, limit_per_host=10) to prevent connector exhaustion under stalls; expose bypass_cache_next() as public helper instead of poking _bypass_cache_once from the coordinator.
• fr.json: use "serrures intelligentes" instead of "smart locks" in lock_not_supported for terminology consistency.