Save _data on AntennaClassification object created by antenna_bounds_checker for future use

[codecov[bot]]

Codecov Report

Base: 96.99% // Head: 97.04% // Increases project coverage by +0.04% :tada:

Coverage data is based on head (5da028f) compared to base (8ce4cac). Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #427 +/- ## ========================================== + Coverage 96.99% 97.04% +0.04% ========================================== Files 10 9 -1 Lines 3530 3517 -13 ========================================== - Hits 3424 3413 -11 + Misses 106 104 -2 ``` | [Impacted Files](https://codecov.io/gh/HERA-Team/hera_qm/pull/427?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=HERA-Team) | Coverage Δ | | |---|---|---| | [hera\_qm/ant\_class.py](https://codecov.io/gh/HERA-Team/hera_qm/pull/427/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=HERA-Team#diff-aGVyYV9xbS9hbnRfY2xhc3MucHk=) | `97.40% <100.00%> (+0.05%)` | :arrow_up: | | [hera\_qm/\_\_init\_\_.py](https://codecov.io/gh/HERA-Team/hera_qm/pull/427/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=HERA-Team#diff-aGVyYV9xbS9fX2luaXRfXy5weQ==) | | | Help us with your feedback. Take ten seconds to tell us [how you rate us](https://about.codecov.io/nps?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=HERA-Team). Have a feature suggestion? [Share it here.](https://app.codecov.io/gh/feedback/?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=HERA-Team)

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