Fix resp may be undefined end_backup issue

[mdegat01]

Proposed change

Resp may not be defined after try in end_backup since the exception is only logged and not re-raised. Only do further processing on the response if the call succeeded.

Type of change

• Dependency upgrade
• Bugfix (non-breaking change which fixes an issue)
• New feature (which adds functionality to the supervisor)
• Breaking change (fix/feature causing existing functionality to break)
• Code quality improvements to existing code or addition of tests

Additional information

• This PR fixes or closes issue: fixes #
• This PR is related to issue:
• Link to documentation pull request:
• Link to cli pull request:

Checklist

• The code change is tested and works locally.
• Local tests pass. Your PR cannot be merged unless tests pass
• There is no commented out code in this PR.
• I have followed the development checklist
• The code has been formatted using Ruff (ruff format supervisor tests)
• Tests have been added to verify that the new code works.

If API endpoints of add-on configuration are added/changed:

• Documentation added/updated for developers.home-assistant.io

Summary by CodeRabbit

• New Features

  • Improved error handling during backup operations, enhancing the clarity of the control flow.
  • Added new test cases to verify system behavior in the event of WebSocket errors during backups.

• Bug Fixes

  • Enhanced robustness of the backup feature by implementing thorough testing for error scenarios.

[coderabbitai]

Walkthrough

Walkthrough

The recent changes enhance the error handling and testing framework for the backup functionality within the Home Assistant module. The control flow of the end_backup function has been refined to improve clarity in error logging. Additionally, new test cases have been added to ensure proper handling of WebSocket errors during backup operations, bolstering the robustness and reliability of the system.

Changes

Files	Change Summary
supervisor/homeassistant/module.py	Restructured error handling in end_backup for improved clarity and debugging.
tests/homeassistant/test_module.py	Added tests for handling WebSocket errors during backup operations, enhancing error management.

Sequence Diagram(s)

sequenceDiagram
    participant User
    participant BackupSystem
    participant WebSocket

    User->>BackupSystem: Initiate Backup
    BackupSystem->>WebSocket: Send Backup Command
    WebSocket-->>BackupSystem: Connection Error
    BackupSystem-->>User: Raise HomeAssistantBackupError

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