refactor: use recursion for nested systems

Co-authored-by: Aayush Sabharwal <aayush.sabharwal@gmail.com>

Author: SebastianM-C

src/systems/abstractsystem.jl

@@ -879,7 +879,7 @@ function namespace_guesses(sys)
 end
 
 function namespace_parameter_dependencies(sys)
-    pdeps = get_parameter_dependencies(sys)
+    pdeps = parameter_dependencies(sys)
     Dict(parameters(sys, k) => namespace_expr(v, sys) for (k, v) in pdeps)
 end
 

src/systems/nonlinear/initializesystem.jl

@@ -102,7 +102,7 @@ function generate_initializesystem(sys::ODESystem;
         full_states,
         pars;
         defaults = merge(ModelingToolkit.defaults(sys), todict(u0), dd_guess),
-        parameter_dependencies = get_parameter_dependencies(sys),
+        parameter_dependencies = parameter_dependencies(sys),
         name,
         kwargs...)