Add climate/select platforms, parallel API, weather sensors v0.10.0

[trcyberoptic]

Summary

Major feature and quality release for the Hoval Connect integration:

• Climate platform for HK (heating) circuits — HEAT/OFF/AUTO modes with target temperature control
• Select entity for week program switching (week1, week2, ecoMode, standby, constant)
• Parallel API calls with asyncio.gather() for significantly faster polling cycles
• Program cache (5min TTL) reduces redundant API calls
• Weather sensors — condition and temperature from Hoval's weather API
• Operation mode sensor (diagnostic) for each circuit
• Request timeout (30s) and automatic token retry on 401 for robustness
• Configurable polling interval (30/60/120/300s) via options flow
• DeviceInfo helpers — eliminates duplicate device info construction across platforms
• EntityCategory.DIAGNOSTIC on program/event/operation sensors
• Code quality: replaced deprecated ensure_future, added debounce cleanup, extracted constants
• 16 unit tests for pure coordinator functions (fan speed resolution, program scheduling)

Files changed (16 files, +837 / -123)

File	Change
climate.py	New — HK heating circuit climate entity
select.py	New — Week program select entity
tests/test_coordinator.py	New — 16 unit tests
coordinator.py	Parallel API, program cache, weather data
__init__.py	DeviceInfo helpers, configurable polling, options listener
api.py	Request timeout, token retry, public invalidate method
sensor.py	Weather + operation mode sensors, diagnostic categories
fan.py	DeviceInfo helper, constants, async_create_task, cleanup
const.py	New constants (timeout, cache TTL, scan interval, circuit names)
config_flow.py	Polling interval option
binary_sensor.py	DeviceInfo helper
strings.json / translations/en.json	New entity translations
manifest.json	Version bump to 0.10.0
CLAUDE.md	Updated documentation

Test plan

• Ruff lint passes (no errors)
• 16 unit tests pass (pytest tests/)
• Manual test: HK climate entity shows current/target temperature
• Manual test: Select entity switches between week programs
• Manual test: Weather sensors display condition and temperature
• Manual test: Options flow allows changing polling interval
• Manual test: Token retry works when session expires mid-poll

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