v1.6.6 — Improved connection error logging

What's new

Better connection error diagnostics

Connection errors during setup now show actionable detail in Settings → System → Logs — no configuration needed.

DNS failure — shows the hostname that failed, the OS-level error code, and three concrete fixes:

• Use an IP address instead of a domain name
• Set a local DNS server in Docker Compose (dns: key)
• Add a hosts entry via HA customisation

.local domains — additional hint that mDNS does not work inside Docker containers.

SSL errors — points directly to Skip SSL certificate verification in Global Settings.

Connection refused — indicates wrong port or service not running.

Network unreachable — suggests checking firewall/VLAN routing.

For verbose API call logging, add to configuration.yaml:
```yaml
logger:
default: warning
logs:
custom_components.arr_stack: debug
```

Fix: debug API logs no longer spam HA warnings

When using debug: true in the card config, API call logs were incorrectly logged at WARNING level. They are now DEBUG level and only visible when the logger above is configured.