v1.0.0-beta.3

Added

• Comprehensive test coverage for coordinator, config flow, and entity behavior.
• Raise an issue when the device is unreachable, with a checklist of troubleshooting steps in the issue description.

Changed

• Diagnostics now redact serial numbers from the config entry title and redact serial fields in returned diagnostics data by default.
• Documentation and README updated to reflect troubleshooting guidance and the new behavior.
• Better serial parsing for UDP packets: extract the fixed serial length from the right-hand side.

Removed

• Interactive repairs/fix flow stub; the "device unreachable" issue is non-fixable.
• Unused utility modules and entity_utils helpers.

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Full Changelog: v1.0.0-beta.2...v1.0.0-beta.3