BUG: evaluate parachute triggers once per time node (#1086)

[thatrandomasiandev]

Pull request type

• Code changes (bug fix, features)

Checklist

• Tests for the changes have been added (if needed)
• Docs have been reviewed and added / updated
• Lint (black rocketpy/ tests/ / make lint) has passed locally
• All tests (pytest tests -m slow --runslow) have passed locally
• CHANGELOG.md — no action needed; an LLM workflow auto-updates it after merge

Current behavior

Each time node evaluated parachute triggers twice: an inline loop in Flight.__simulate and again in __check_and_handle_parachute_triggers.

Fixes #1086

New behavior

The inline loop is removed; only __check_and_handle_parachute_triggers runs per node. Regression test asserts one call per sampled height.

Breaking change

• No

Additional information

Focused unit tests added/extended; full slow suite not run in this contribution pass.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 82.59%. Comparing base (e0ff281) to head (d062c37).
⚠️ Report is 49 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #1121      +/-   ##
===========================================
+ Coverage    82.18%   82.59%   +0.41%     
===========================================
  Files          122      128       +6     
  Lines        16355    16603     +248     
===========================================
+ Hits         13441    13714     +273     
+ Misses        2914     2889      -25     

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[ting-hong-shieh]

I ran the same never-deploying 10 Hz trigger on current develop (cb6106a717207dd8fc2dfe1446d80ff75022f21b) and on this head (d062c37f6c7f5d3e8037f4673744784183323d4b). The flight inputs were identical.

Measurement	develop	PR head
trigger calls	600	300
unique rounded node heights	300	300
clean pressure rows	600	300
noise rows, including the initial row	601	301

This confirms that the duplicate path was evaluating the trigger and appending pressure data twice at each node. The head keeps one evaluation and one pressure row per node.

The committed regression file also passes independently: pytest tests/unit/test_parachute_triggers.py -q → 4 passed.

Environment: Python 3.12.6; NumPy 2.5.2; pytest 9.1.1; macOS 26.5.2 arm64.