mnt/extract flight data exporters

[CameronBrooks11]

Pull request type

• Code maintenance (refactoring, formatting, tests)

Checklist

• Tests for the changes have been added (if needed)
• Docs have been reviewed and added / updated
• Lint (black rocketpy/ tests/) has passed locally
• All tests (pytest tests -m slow --runslow) have passed locally
• CHANGELOG.md has been updated (if relevant)

Current behavior

Export routines for Flight live as instance methods in rocketpy/simulation/flight.py (export_data, export_pressures, export_sensor_data, export_kml). This mixes simulation with I/O concerns and forces an import-time dependency on simplekml for users who do not export.

New behavior

• Extracted exporters into a new class FlightDataExporter at rocketpy/simulation/flight_data_exporter.py.
• Added deprecation wrappers on Flight methods that delegate to FlightDataExporter and emit DeprecationWarning with migration guidance.
• Re-exported FlightDataExporter in rocketpy/simulation/__init__.py.
• No functional changes to outputs or signatures aside from deprecation.
• Deprecation schedule: wrappers remain until v1.12.0.
• Migration example:

from rocketpy.simulation import FlightDataExporter

exporter = FlightDataExporter(test_flight)
exporter.export_data("out.csv", "angle_of_attack", "mach_number")

Breaking change

• No

Additional information

• Local runs show deprecation warnings during integration tests where legacy methods are exercised. Example: Moved to FlightDataExporter.export_data() and will be removed in v1.12.0.
• Headless plotting for integration tests was configured with MPLBACKEND=Agg.
• Formatting-only changes were intentionally excluded from this PR to keep the diff focused on the refactor.

[Gui-FernandesBR]

I really like what I see here... I will take a look at it asap

[codecov]

Codecov Report

❌ Patch coverage is 81.81818% with 18 lines in your changes missing coverage. Please review.
✅ Project coverage is 80.28%. Comparing base (f17893b) to head (b88abc4).
⚠️ Report is 25 commits behind head on develop.

Files with missing lines	Patch %	Lines
rocketpy/simulation/flight_data_exporter.py	79.31%	18 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #845      +/-   ##
===========================================
+ Coverage    80.02%   80.28%   +0.26%     
===========================================
  Files           98      104       +6     
  Lines        12004    12754     +750     
===========================================
+ Hits          9606    10240     +634     
- Misses        2398     2514     +116     

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[CameronBrooks11]

Sounds good, let me know if there's anything that needs to be done or revised before this can be merged to develop...I have some enhancements of the kml export I have in the works and I'd rather not stack the PR branches and have to deal with rebasing later if we can help it :)

[CameronBrooks11]

@Gui-FernandesBR Sorry if this PR disappeared for a few days...my account got false flagged by the GitHub bots

[CameronBrooks11]

Hi, it's been over a month now and still waiting on a reviewer to be assigned and take a look. I actually spent extra effort trying to make the PR extra nice and clean so it could just get merged quickly...like I said I had intended to continue more PRs concerning file IO but this going stale has kinda thrown a wrench in that.

[Copilot]

Pull Request Overview

This PR extracts flight data export functionality from the Flight class into a dedicated FlightDataExporter class to improve separation of concerns and reduce import-time dependencies.

• Moved four export methods (export_data, export_pressures, export_sensor_data, export_kml) from Flight to FlightDataExporter
• Added deprecation wrappers in the Flight class that delegate to the new exporter
• Updated documentation to showcase the new API with migration examples

Reviewed Changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
rocketpy/simulation/flight_data_exporter.py	New class containing extracted export functionality
rocketpy/simulation/flight.py	Deprecated export methods now delegate to FlightDataExporter
rocketpy/simulation/__init__.py	Re-exports FlightDataExporter for public API access
tests/unit/test_flight_export_deprecation.py	Tests verifying deprecation warnings and delegation behavior
tests/unit/test_flight_data_exporter.py	Tests for the new exporter class functionality
docs/user/first_simulation.rst	Updated examples to use new API with deprecation notes
CHANGELOG.md	Documents the deprecation and extraction changes

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[Gui-FernandesBR]

Brilliant work!!

@CameronBrooks11 I will just wait a few more days so either @phmbressan or @MateusStano give us a second approve and then we will proceed to merge.