feat(plant): temperature RECOVERY alerts - tiered clear notifications [#344]

Recovery twin of the high-temperature alert: per-tier below-triggers
(fire-line minus 5F, held 10 min), from_state guard against restart
false-positives, peak-value reporting. Matches existing notify
targets; UPS on-battery already had its restored twin.

Detail: https://projects.knownelement.com/issues/344

automations.yaml

@@ -371,3 +371,139 @@
         pulled. Restarting HA core (webhook re-registration) - back in
         ~1 min.
   - action: homeassistant.restart
+- id: pfv_plant_temperature_recovered
+  alias: PFV plant - temperature recovered
+  description: >-
+    Recovery twin of the high-temperature alert [#344 ask 2026-09-03]:
+    notify when a sensor that was OVER its tier drops back below
+    (fire-line minus 5F hysteresis) and HOLDS there for 10 minutes.
+    from_state guard prevents spurious fires at HA restart; the tier
+    map mirrors the high-temperature automation thresholds exactly.
+  triggers:
+  - trigger: numeric_state
+    entity_id:
+    - sensor.pfv_tsys3_nvme_temperature
+    - sensor.pfv_tsys5_nvme_temperature
+    below: 145
+    for: 00:10:00
+  - trigger: numeric_state
+    entity_id:
+    - sensor.pfv_tsys4_dimm_18_temperature
+    - sensor.pfv_tsys4_dimm_19_temperature
+    - sensor.pfv_tsys4_dimm_1a_temperature
+    - sensor.pfv_tsys4_dimm_1b_temperature
+    below: 135
+    for: 00:10:00
+  - trigger: numeric_state
+    entity_id:
+    - sensor.pfv_tsys1_drive_temperature
+    - sensor.pfv_tsys4_drive_0_0_temperature
+    - sensor.pfv_tsys4_drive_0_10_temperature
+    - sensor.pfv_tsys4_drive_1_0_temperature
+    - sensor.pfv_tsys4_drive_1_10_temperature
+    - sensor.pfv_tsys5_drive_1_0_temperature
+    - sensor.pfv_tsys5_drive_4_10_temperature
+    - sensor.pfv_tsys5_drive_4_20_temperature
+    - sensor.pfv_tsys5_drive_4_30_temperature
+    - sensor.pfv_tsys9_drive_temperature
+    below: 135
+    for: 00:10:00
+  - trigger: numeric_state
+    entity_id:
+    - sensor.pfv_tsys3_gpu_temperature
+    - sensor.pfv_jetson_gpu_temperature
+    below: 180
+    for: 00:10:00
+  - trigger: numeric_state
+    entity_id:
+    - sensor.pfv_tsys3_pch_temperature
+    - sensor.pfv_tsys9_pch_temperature
+    below: 155
+    for: 00:10:00
+  - trigger: numeric_state
+    entity_id:
+    - sensor.pfv_tsys3_cpu_temperature
+    - sensor.pfv_tsys6_cpu_temperature
+    - sensor.pfv_tsys7_cpu_temperature
+    - sensor.pfv_tsys9_cpu_temperature
+    - sensor.pfv_tsys7_drac_cpu1
+    - sensor.pfv_tsys7_drac_cpu2
+    - sensor.pfv_jetson_temperature
+    - sensor.pfv_svrpi_temperature
+    - sensor.pfv_subopi3_temperature
+    - sensor.pfv_subopi_dev_3_temperature
+    - sensor.pfv_subopi_dev_4_temperature
+    below: 171
+    for: 00:10:00
+  - trigger: numeric_state
+    entity_id:
+    - sensor.pfv_artroom_temperature
+    - sensor.pfv_garage_temperature
+    - sensor.pfv_tsys1_rack_temperature
+    - sensor.pfv_tsys4_ambient_temperature
+    - sensor.pfv_tsys5_ambient_temperature
+    - sensor.pfv_tsys6_drac_ambient
+    - sensor.pfv_tsys7_drac_inlet
+    - sensor.pfv_tsys7_drac_exhaust
+    below: 99
+    for: 00:10:00
+  actions:
+  - variables:
+      fire_lines:
+        sensor.pfv_tsys3_nvme_temperature: 150
+        sensor.pfv_tsys5_nvme_temperature: 150
+        sensor.pfv_tsys4_dimm_18_temperature: 140
+        sensor.pfv_tsys4_dimm_19_temperature: 140
+        sensor.pfv_tsys4_dimm_1a_temperature: 140
+        sensor.pfv_tsys4_dimm_1b_temperature: 140
+        sensor.pfv_tsys1_drive_temperature: 140
+        sensor.pfv_tsys4_drive_0_0_temperature: 140
+        sensor.pfv_tsys4_drive_0_10_temperature: 140
+        sensor.pfv_tsys4_drive_1_0_temperature: 140
+        sensor.pfv_tsys4_drive_1_10_temperature: 140
+        sensor.pfv_tsys5_drive_1_0_temperature: 140
+        sensor.pfv_tsys5_drive_4_10_temperature: 140
+        sensor.pfv_tsys5_drive_4_20_temperature: 140
+        sensor.pfv_tsys5_drive_4_30_temperature: 140
+        sensor.pfv_tsys9_drive_temperature: 140
+        sensor.pfv_tsys3_gpu_temperature: 185
+        sensor.pfv_jetson_gpu_temperature: 185
+        sensor.pfv_tsys3_pch_temperature: 160
+        sensor.pfv_tsys9_pch_temperature: 160
+        sensor.pfv_tsys3_cpu_temperature: 176
+        sensor.pfv_tsys6_cpu_temperature: 176
+        sensor.pfv_tsys7_cpu_temperature: 176
+        sensor.pfv_tsys9_cpu_temperature: 176
+        sensor.pfv_tsys7_drac_cpu1: 176
+        sensor.pfv_tsys7_drac_cpu2: 176
+        sensor.pfv_jetson_temperature: 176
+        sensor.pfv_svrpi_temperature: 176
+        sensor.pfv_subopi3_temperature: 176
+        sensor.pfv_subopi_dev_3_temperature: 176
+        sensor.pfv_subopi_dev_4_temperature: 176
+        sensor.pfv_artroom_temperature: 104
+        sensor.pfv_garage_temperature: 104
+        sensor.pfv_tsys1_rack_temperature: 104
+        sensor.pfv_tsys4_ambient_temperature: 104
+        sensor.pfv_tsys5_ambient_temperature: 104
+        sensor.pfv_tsys6_drac_ambient: 104
+        sensor.pfv_tsys7_drac_inlet: 104
+        sensor.pfv_tsys7_drac_exhaust: 104
+      fire: "{{ fire_lines.get(trigger.entity_id, 0) | int }}"
+  - condition: template
+      value_template: >-
+        {{ trigger.from_state is not none
+           and trigger.from_state.state not in ['unavailable', 'unknown', 'none']
+           and trigger.from_state.state | float(-1) >= fire }}
+  - action: notify.send_message
+    target:
+      entity_id:
+      - notify.ultix_sidecar_new
+      - notify.allthes_ipad
+    data:
+      title: TEMPERATURE RECOVERED
+      message: >-
+        {{ state_attr(trigger.entity_id, 'friendly_name') | default(trigger.entity_id) }}
+        back to {{ states(trigger.entity_id) }}°F and holding — was
+        {{ trigger.from_state.state }}°F when the alert cleared (tier fire line {{ fire }}°F).
+  mode: single