BUG: Fix hard-coded radius value for parachute added mass calculation (#889)

* Fix hard-coded radius value for parachute added mass calculation

Calculate radius from cd_s using a typical hemispherical parachute drag
coefficient (1.4) when radius is not explicitly provided. This fixes
drift distance calculations for smaller parachutes like drogues.

Formula: R = sqrt(cd_s / (Cd * π))

Closes #860

Co-authored-by: Gui-FernandesBR <63590233+Gui-FernandesBR@users.noreply.github.com>

Address code review: improve docstrings and add explicit None defaults

Co-authored-by: Gui-FernandesBR <63590233+Gui-FernandesBR@users.noreply.github.com>

Add CHANGELOG entry for PR #889

Co-authored-by: Gui-FernandesBR <63590233+Gui-FernandesBR@users.noreply.github.com>

Update rocket.add_parachute to use radius=None for consistency

Changed the default radius from 1.5 to None in the add_parachute method
to match the Parachute class behavior. This ensures consistent automatic
radius calculation from cd_s across both APIs.

Co-authored-by: Gui-FernandesBR <63590233+Gui-FernandesBR@users.noreply.github.com>

Refactor Parachute class to remove hard-coded radius value and introduce drag_coefficient parameter for radius estimation

Fix hard-coded radius value for parachute added mass calculation

Calculate radius from cd_s using a typical hemispherical parachute drag
coefficient (1.4) when radius is not explicitly provided. This fixes
drift distance calculations for smaller parachutes like drogues.

Formula: R = sqrt(cd_s / (Cd * π))

Closes #860

Co-authored-by: Gui-FernandesBR <63590233+Gui-FernandesBR@users.noreply.github.com>

Add CHANGELOG entry for PR #889

Co-authored-by: Gui-FernandesBR <63590233+Gui-FernandesBR@users.noreply.github.com>

Refactor Parachute class to remove hard-coded radius value and introduce drag_coefficient parameter for radius estimation

MNT: Extract noise initialization to fix pylint too-many-statements in Parachute.__init__

Co-authored-by: Gui-FernandesBR <63590233+Gui-FernandesBR@users.noreply.github.com>

* Refactor environment method access in controller test for clarity

* fix pylint

* fix comments

* avoid breaking change with drag_coefficient

* reafactors Parachute.__init__ method

* fix tests

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: Gui-FernandesBR <63590233+Gui-FernandesBR@users.noreply.github.com>
Co-authored-by: Gui-FernandesBR <guilherme_fernandes@usp.br>

Author: 2 people

tests/integration/simulation/test_flight.py

@@ -800,7 +800,49 @@ def controller(  # pylint: disable=unused-argument
     return controller
 
 
-def test_environment_methods_accessible_in_controller(  # pylint: disable=too-many-statements
+def make_controller_test_environment_access(methods_called):
+    def _call_env_methods(environment, altitude_asl):
+        _ = environment.elevation
+        methods_called["elevation"] = True
+        _ = environment.wind_velocity_x(altitude_asl)
+        methods_called["wind_velocity_x"] = True
+        _ = environment.wind_velocity_y(altitude_asl)
+        methods_called["wind_velocity_y"] = True
+        _ = environment.speed_of_sound(altitude_asl)
+        methods_called["speed_of_sound"] = True
+        _ = environment.pressure(altitude_asl)
+        methods_called["pressure"] = True
+        _ = environment.temperature(altitude_asl)
+        methods_called["temperature"] = True
+
+    def controller(  # pylint: disable=unused-argument
+        time,
+        sampling_rate,
+        state,
+        state_history,
+        observed_variables,
+        air_brakes,
+        sensors,
+        environment,
+    ):
+        """Controller that tests access to various environment methods."""
+        altitude_asl = state[2]
+
+        if time < 3.9:
+            return None
+
+        try:
+            _call_env_methods(environment, altitude_asl)
+            air_brakes.deployment_level = 0.3
+        except AttributeError as e:
+            raise AssertionError(f"Environment method not accessible: {e}") from e
+
+        return (time, air_brakes.deployment_level)
+
+    return controller
+
+
+def test_environment_methods_accessible_in_controller(
     calisto_robust, example_plain_env
 ):
     """Test that all environment methods are accessible within the controller.