core: stdcm: minor cleanup + bugfix

[eckter]

• Fix formatting of edge / node comments. It got weird when going to java to kotlin, then worse with the auto-formatter
• Remove unused fields in STDCMEdge
• Small bugfix on V1 with time since departure

[codecov-commenter]

Codecov Report

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

Project coverage is 28.54%. Comparing base (0c3db4e) to head (1a4cce2). Report is 1 commits behind head on dev.

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Additional details and impacted files

```diff @@ Coverage Diff @@ ## dev #7869 +/- ## ============================================ - Coverage 28.54% 28.54% -0.01% - Complexity 2059 2060 +1 ============================================ Files 1249 1249 Lines 154130 154183 +53 Branches 3040 3041 +1 ============================================ + Hits 44003 44006 +3 - Misses 108313 108363 +50 Partials 1814 1814 ``` | [Flag](https://app.codecov.io/gh/OpenRailAssociation/osrd/pull/7869/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=None) | Coverage Δ | | |---|---|---| | [core](https://app.codecov.io/gh/OpenRailAssociation/osrd/pull/7869/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=None) | `74.96% <100.00%> (-0.05%)` | :arrow_down: | | [editoast](https://app.codecov.io/gh/OpenRailAssociation/osrd/pull/7869/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=None) | `71.64% <ø> (-0.11%)` | :arrow_down: | | [front](https://app.codecov.io/gh/OpenRailAssociation/osrd/pull/7869/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=None) | `10.01% <ø> (+<0.01%)` | :arrow_up: | | [gateway](https://app.codecov.io/gh/OpenRailAssociation/osrd/pull/7869/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=None) | `2.34% <ø> (ø)` | | | [railjson_generator](https://app.codecov.io/gh/OpenRailAssociation/osrd/pull/7869/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=None) | `87.49% <ø> (ø)` | | | [tests](https://app.codecov.io/gh/OpenRailAssociation/osrd/pull/7869/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=None) | `72.93% <ø> (-0.24%)` | :arrow_down: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=None#carryforward-flags-in-the-pull-request-comment) to find out more.

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