fixing sensitivity analysis in simulation.

[Cardoza2]

The sensitivity parameter vector wasn't getting updated inside of GXBeam, so it was using the initial loading for all time steps.

[Copilot]

Pull request overview

Fixes aerostructural sensitivity analysis by ensuring GXBeam receives the updated parameter vector each time step (instead of reusing the initial loading throughout the simulation).

Changes:

• Pass pfunc and p into GXBeam.step_system! during the time loop so sensitivities/parameters can update per step.
• Minor cleanup of commented/debug code in the simulation initialization/time-loop sections.
• Adds a small commented debug snippet in update_forces! (currently disabled).

Reviewed changes

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

File	Description
src/gxbeam.jl	Adds (commented-out) debug printing around distributed loads inside update_forces!.
src/aerostructural.jl	Ensures GXBeam.step_system! is called with pfunc/p so parameter/sensitivity updates propagate across time steps.

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[Copilot]

The commented-out debug block (@show distributed_loads[ielem]) adds noise in a hot-path function. If you still need this for troubleshooting, consider guarding it behind an existing verbose/debug flag or removing it before merging.

Suggested change

	# if ielem==length(assembly.elements)
	# @show distributed_loads[ielem]
	# end

[Copilot]

For consistency with other GXBeam calls in this file (e.g., initialize_system!), consider using Julia's keyword shorthand (; pfunc, p) and wrapping this long call across multiple lines. Also remove the trailing whitespace at the end of the line to avoid churn in future diffs.