feat(homeassistant): use json_attributes for TRVZB weekly_schedule sensor

[abaddon]

The weekly_schedule composite expose produces JSON that exceeds Home Assistant's 255 character state limit. This change:

• Shows a human-readable summary in the state ("7 days configured")
• Stores the full schedule data as entity attributes
• Allows access to individual days via state_attr()

Fixes the truncated weekly_schedule sensor for Sonoff TRVZB and other TRV devices with schedule support.

Attached the outcome on Home Assistant

[abaddon]

Hi @Koenkk , when you have time, I'm glad if you can review this fix to publish on HA correctly the weekly schedule value.
It's my first contribution and any feedback is more than welcome.

[Koenkk]

This code is too specific for the TRVZ, e.g. another device might expose a weekly_schedule with completely different child properties. I would propose instead of using the single composite expose, expose 1 day per expose: https://github.com/Koenkk/zigbee-herdsman-converters/blob/0a939c0c19bd20e97ac5bda8a0ca3e85ad6d7db3/src/devices/sonoff.ts#L349

[abaddon]

Ok clear, thx for the feedback.
On HA you see now an attribute for each day like:

• sensor.{device_id}_weekly_schedule_monday
• sensor.{device_id}_weekly_schedule_tuesday
  etc..

Attached the output on HA

Let me know if you have any other suggestion

[Koenkk]

Sorry I meant not making any changes here but only here: https://github.com/Koenkk/zigbee-herdsman-converters/blob/0a939c0c19bd20e97ac5bda8a0ca3e85ad6d7db3/src/devices/sonoff.ts#L349

[abaddon]

Ah ok, I created a new PR Koenkk/zigbee-herdsman-converters#11051 with the changes suggested.