[compass_app] Refresh home after booking

[Ersaoktaviannn]

Summary

• reload HomeViewModel when the retained home route becomes active again
• keep route-listener ownership alongside the view model in HomeScreenContainer
• add a regression test covering a booking created while a child route is active
• document the fix in the changelog

Fixes #2877.

Testing

• flutter analyze --no-pub (from compass_app/app)
• flutter test --no-pub (68 tests)
• verified the regression test fails without the route listener and passes with the fix

Pre-launch Checklist

• I read the Flutter Style Guide recently, and have followed its advice.
• I signed the CLA.
• I read the Contributors Guide.
• I have added sample code updates to the changelog.
• I updated/added relevant documentation (no public API documentation changes are needed).

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[Ersaoktaviannn]

@googlebot rescan