Platinum quality upgrade with sensor platform, tests, and brand images

[MichaelB2018]

Summary

Major upgrade bringing the integration to Platinum quality scale standards. This is a complete rewrite of the integration while preserving the original domain and functionality.

What's New

Sensor Platform

• Diagnostic sensors for zone count, time zone, DST status, location, and add-a-light mode on the hub device

Vendored Hub Library

• Replaced the lc7001 PyPI dependency with a vendored hub.py (from lc7001 v1.0.5, MIT license by Ross Tyler)
• Only runtime dependency is now cryptography>=42.0.0
• Async TCP client with event-driven architecture (local_push)

Config Flow Improvements

• DHCP auto-discovery support
• Reauthentication flow (detects auth failures and prompts for new password)
• Reconfigure flow (change hub IP without removing the integration)

Diagnostics

• Hub status, zone properties, and authentication state with proper redaction

Brand Images

• icon.png, icon@2x.png, and logo.png in both brand/ (repo root for HACS) and custom_components/legrand_rflc/brand/ (for HA local branding)

Full Test Suite

• test_config_flow.py — user step, reauth, reconfigure, DHCP discovery, error handling
• test_init.py — setup, teardown, unload
• test_light.py — entity creation, state updates, commands, availability, brightness normalization
• test_diagnostics.py — connected/disconnected output, auth redaction

Other Improvements

• Entity model uses _attr_has_entity_name = True with translation keys
• DeviceInfo on every entity (switch, dimmer, hub)
• Brightness normalization: HA 0–255 ↔ LC7001 0–100
• Transition/fade support on dimmers
• Event-driven availability tracking (connected/disconnected/authenticated/unauthenticated)
• Automatic reload on zone add/delete
• quality_scale.yaml tracking all HA quality scale rules
• PEP 561 py.typed marker
• Updated manifest.json with integration_type: device, DHCP matchers, and iot_class: local_push

Breaking Changes

None — this is a drop-in upgrade. Existing users will see new sensor entities appear after updating.

Testing

Tests use pytest-homeassistant-custom-component. Run with: