feat(fleet): zero-value climate results for low-altitude flights & dependency updates (v0.7.10)

[JarryGabriel]

Summary

This PR introduces graceful handling of low-altitude flights in the fleet runner pipeline, updates core dependencies, and tunes several default parameters. Previously, flights that failed due to low-altitude trajectories were reported as raw errors; they now produce structured zero-value climate results, making downstream consumption consistent regardless of failure cause.

Changes

🚀 Feature — Low-altitude flight zero-results

• FleetRunner._separate_low_altitude_errors() — new static method that splits error records into low-altitude zero-results vs other errors based on the _LOW_ALTITUDE_ERROR_MARKER sentinel.
• _build_zero_climate_result() — builds a full climate result dict with all-zero metrics (CO2, CH4, O3, H2O, Contrails) across all time horizons, flagged with low_altitude_flight: true.
• _extract_results() updated to use the separation logic in both the normal and pipeline-aborted code paths, ensuring low-altitude flights always appear as structured results rather than raw errors.

📦 Dependency updates

Package	Before	After	Reason
pycontrails	0.60.1	0.60.2	Bugfix release
pybada	>=0.1.11	==0.1.12	Pin to tested version
scipy	>=1.11.0,<1.17.0	>=1.11.0	Relax upper bound

• Added [tool.hatch.metadata] allow-direct-references = true for git-sourced dependencies.

⚙️ Parameter tuning

Parameter	Before	After	Rationale
DEFAULT_FUEL_BURN_THRESHOLD	1.1	1.2	Wider margin for edge-case aircraft
DEFAULT_MIN_ALTITUDE_FL	15	20	Better ground-level filtering (2000 ft)
MAX_NONCO2_CO2_RATIO	100.0	500.0	Reduce false-positive warnings on valid flights

🧹 Minor clean-ups

• Removed stale inline comments (Legacy, New/Integrated) in gwp.py imports.
• Updated MEEM acronym expansion in docstring.

🧪 Tests

• New file: tests/test_zero_climate_result.py (384 lines) — comprehensive test suite covering:
  • _build_zero_climate_result unit tests (structure, species, horizons, NaN handling)
  • _separate_low_altitude_errors with mixed, all-low-altitude, and no-low-altitude cases
  • _extract_results functional tests (normal + aborted pipeline paths)
  • Edge cases (empty records, all errors low-altitude, no low-altitude errors)

Files changed (7)

File	Change
CHANGELOG.md	New v0.7.10 entry
pyproject.toml	Dependency updates + hatch metadata config
src/pyneats/core/neats_default_parameters.py	Parameter tuning
src/pyneats/runners/fleet.py	Low-altitude zero-result feature
src/pyneats/steps/climate_metrics/gwp.py	Comment clean-up
tests/test_zero_climate_result.py	[NEW] Test suite
uv.lock	Lock file update