v0.3.4 - v1 quality gate

Quality hardening

• Add complete tests for integration setup/unload, services and sensor behavior
• Add Config Flow and Options Flow tests
• Add Lovelace API adapter and diagnostics tests
• Increase the suite from 43 to 83 tests
• Raise measured coverage from 73% to 96%
• Enforce a 90% coverage gate in GitHub Actions
• Enforce Ruff lint in GitHub Actions
• Remove the incorrect Germany-only HACS country metadata; the integration is globally applicable

Validation

• 83 tests passed against Home Assistant Core 2026.7.2
• 95.58% measured coverage
• Ruff passed
• Compileall passed
• Hassfest passed
• HACS validation passed
• GitHub Tests and Validate workflows passed