imp(core): remove `State::Uninitialized` check while parsing `ConnectionEnd`

[rnbguy]

Closes: #1123

Description

---

PR author checklist:

• [x] Added changelog entry, using unclog.
• [ ] Added tests.
• [x] Linked to GitHub issue.
• [ ] Updated code comments and documentation (e.g., docs/).
• [x] Tagged one reviewer who will be the one responsible for shepherding this PR.

Reviewer checklist:

• [ ] Reviewed Files changed in the GitHub PR explorer.
• [ ] Manually tested (in case integration/unit/mock tests are absent).

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 66.50%. Comparing base (3b11b12) to head (7e9ea2f).

:exclamation: Current head 7e9ea2f differs from pull request most recent head 627eef6. Consider uploading reports for the commit 627eef6 to get more accurate results

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #1126 +/- ## ========================================== + Coverage 66.46% 66.50% +0.04% ========================================== Files 209 209 Lines 20706 20692 -14 ========================================== Hits 13762 13762 + Misses 6944 6930 -14 ```

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.