Add Aqua Plus APAIO270 heat pump water heater (#5586)

* feat(devices): add Aqua Plus APAIO270 heat pump water heater

Modelled as a water_heater entity with Standard/Booster/E-Heater
operation modes, plus diagnostic sensors for temperatures, pressure
switches, fan speed, and electrical readings. DP map recovered via
the Tuya Cloud API thing-model endpoint and cross-verified live
against the manufacturer's own app across all three modes.

Does not duplicate the setpoint/current temperature DPs as standalone
sensors (unlike the earlier #5548 submission) per maintainer feedback
that no such precedent survives in the current device set.

* Refactor water heater device YAML configuration

Refactor sensor and binary_sensor entities for consistency and clarity. Update value mappings and adjust class types where necessary.

---------

Co-authored-by: Jason Rumney <make-all@users.noreply.github.com>

DEVICES.md

@@ -220,6 +220,7 @@
 
 - Apricus heat pump water heater
 - A.O. Smith HeatBot 15L electric water heater
+- Aqua Plus APAIO270 heat pump water heater
 - Aquatech Rapid/X6 heat pump water heater
 - Aquaviva AVH15S combo air-water heat pump
 - Arçelik AHPH-MM series combo air-water heat pump

custom_components/tuya_local/devices/aquaplus_apaio270_waterheater.yaml

@@ -0,0 +1,306 @@
+name: Heat pump water heater
+products:
+  - id: zcuzgqkr3aef1hap
+    manufacturer: Aqua Plus
+    model: APAIO270
+entities:
+  - entity: water_heater
+    dps:
+      - id: 1
+        type: boolean
+        name: operation_mode
+        mapping:
+          - dps_val: false
+            value: "off"
+          - dps_val: true
+            constraint: mode
+            conditions:
+              - dps_val: Stand
+                value: heat_pump
+              - dps_val: Boost
+                value: performance
+              - dps_val: ELE
+                value: electric
+      - id: 2
+        type: string
+        name: mode
+        hidden: true
+      - id: 4
+        type: integer
+        name: temperature
+        unit: C
+        range:
+          min: 15
+          max: 75
+      - id: 21
+        type: integer
+        name: current_temperature
+        unit: C
+  # Target/tank temperature are intentionally not duplicated as standalone
+  # sensors here (see PR #5548 discussion) - only the current/measured value
+  # convention has precedent elsewhere in this repo, and even that was
+  # rejected upstream. If long-term statistics for these values are wanted,
+  # add `template:` sensors in your own HA config instead.
+  - entity: binary_sensor
+    translation_key: defrost
+    category: diagnostic
+    dps:
+      - id: 7
+        type: boolean
+        name: sensor
+  - entity: sensor
+    name: Expansion valve position
+    icon: "mdi:pipe-valve"
+    category: diagnostic
+    dps:
+      - id: 14
+        type: integer
+        name: sensor
+  - entity: binary_sensor
+    class: problem
+    category: diagnostic
+    dps:
+      - id: 15
+        type: bitfield
+        name: sensor
+        mapping:
+          - dps_val: 0
+            value: false
+          - value: true
+      - id: 15
+        type: bitfield
+        name: fault_code
+  - entity: sensor
+    name: Phase sequence module
+    class: enum
+    category: diagnostic
+    dps:
+      - id: 17
+        type: string
+        name: sensor
+        mapping:
+          - dps_val: "NO"
+            value: Nothing
+          # "normal" and "ERR" are unconfirmed guesses - never observed live
+          - dps_val: normal
+            value: Normal
+          - dps_val: ERR
+            value: Error
+  - entity: sensor
+    name: Fan speed
+    class: enum
+    translation_key: status
+    category: diagnostic
+    dps:
+      - id: 19
+        type: string
+        name: sensor
+        mapping:
+          - dps_val: "OFF"
+            value: "off"
+          - dps_val: LOW
+            value: low
+          - dps_val: High
+            value: high
+  - entity: sensor
+    name: Suction temperature
+    class: temperature
+    category: diagnostic
+    dps:
+      - id: 20
+        type: integer
+        name: sensor
+        unit: C
+        class: measurement
+  - entity: sensor
+    name: Return water temperature
+    class: temperature
+    category: diagnostic
+    dps:
+      - id: 22
+        type: integer
+        name: sensor
+        unit: C
+        class: measurement
+  - entity: sensor
+    name: Coil temperature
+    class: temperature
+    category: diagnostic
+    dps:
+      - id: 23
+        type: integer
+        name: sensor
+        unit: C
+        class: measurement
+  - entity: sensor
+    name: Discharge temperature
+    class: temperature
+    category: diagnostic
+    dps:
+      - id: 24
+        type: integer
+        name: sensor
+        unit: C
+        class: measurement
+  - entity: sensor
+    translation_key: ambient_temperature
+    class: temperature
+    dps:
+      - id: 26
+        type: integer
+        name: sensor
+        unit: C
+        class: measurement
+  - entity: binary_sensor
+    name: Compressor
+    class: running
+    category: diagnostic
+    dps:
+      - id: 27
+        type: boolean
+        name: sensor
+  - entity: binary_sensor
+    name: Four-way valve
+    class: opening
+    category: diagnostic
+    dps:
+      - id: 28
+        type: boolean
+        name: sensor
+  - entity: sensor
+    name: Circulation mode
+    class: enum
+    category: diagnostic
+    dps:
+      - id: 30
+        type: boolean
+        name: sensor
+        mapping:
+          - dps_val: true
+            value: Fluorine
+          - dps_val: false
+            value: Water
+  - entity: binary_sensor
+    name: Low pressure switch
+    class: opening
+    category: diagnostic
+    dps:
+      - id: 29
+        type: boolean
+        name: sensor
+        mapping:
+          - dps_val: true
+            value: false
+          - dps_val: false
+            value: true
+  - entity: binary_sensor
+    name: Water pump
+    class: running
+    category: diagnostic
+    dps:
+      - id: 31
+        type: boolean
+        name: sensor
+  - entity: binary_sensor
+    name: Electric heating element
+    class: running
+    category: diagnostic
+    dps:
+      - id: 32
+        type: boolean
+        name: sensor
+  - entity: binary_sensor
+    name: High pressure switch
+    class: opening
+    category: diagnostic
+    dps:
+      - id: 33
+        type: boolean
+        name: sensor
+  - entity: binary_sensor
+    name: Linked switch
+    class: opening
+    category: diagnostic
+    dps:
+      # true/false to Close/Open confirmed via app; significance of the
+      # linkage feature itself (likely PV/solar interlock) is unconfirmed
+      - id: 106
+        type: boolean
+        name: sensor
+        mapping:
+          - dps_val: true
+            value: false
+          - dps_val: false
+            value: true
+  - entity: sensor
+    name: Compressor runtime before defrost
+    class: duration
+    category: diagnostic
+    dps:
+      - id: 41
+        type: integer
+        name: sensor
+        unit: min
+  - entity: sensor
+    class: current
+    category: diagnostic
+    dps:
+      - id: 101
+        type: integer
+        name: sensor
+        unit: A
+        class: measurement
+        mapping:
+          - scale: 1000
+  - entity: sensor
+    class: voltage
+    category: diagnostic
+    dps:
+      - id: 102
+        type: integer
+        name: sensor
+        unit: V
+        class: measurement
+        mapping:
+          - scale: 10
+  - entity: sensor
+    class: power
+    category: diagnostic
+    dps:
+      - id: 103
+        type: integer
+        name: sensor
+        unit: W
+        class: measurement
+        mapping:
+          - scale: 10
+  - entity: sensor
+    name: Total energy
+    class: energy
+    category: diagnostic
+    dps:
+      - id: 104
+        type: integer
+        name: sensor
+        unit: kWh
+        class: total_increasing
+        mapping:
+          - scale: 100
+      - id: 18
+        type: integer
+        name: daily
+        mapping:
+          - scale: 100
+  - entity: binary_sensor
+    name: Water flow switch
+    class: opening
+    category: diagnostic
+    dps:
+      - id: 107
+        type: boolean
+        name: sensor
+        mapping:
+          - dps_val: true
+            value: false
+          - dps_val: false
+            value: true