HA - Use templated attribute dictionary for time trigger

cat_feeder_Sched.yaml

template:
  - sensor:
      - name: Cat Schedule  
        state: '{{ now() }}'
        attributes:
          cat_sched: | 
            {{ { "07:00": 3,
              "11:00": 1,
              "15:00": 2,
              "21:00": 2,
              "23:00": 2 } }}
              
automation:
  - alias: Cat feeder schedule
    description: ""
    trigger:
      - platform: template
        value_template: |
          {% set cat_sched = state_attr('sensor.cat_schedule','cat_sched') %}
          {{ now().strftime('%H:%M') in cat_sched.keys() }}
    condition: []
    action:
      - variables:
          time: "{{ now().strftime('%H:%M') }}"
          cat_sched: "{{state_attr('sensor.cat_schedule','cat_sched')}}"
      - service: persistent_notification.create
        data:
          message: |
            Portion: {{ cat_sched.get(time) }}
            Next Event: 
            {%- set keys = cat_sched.keys()|sort %}
            {{- keys|first if time == keys|last 
            else keys|select('gt', time)|first }}
    mode: single