fix: handle Const in connection expansion

Author: AayushSabharwal

src/systems/analysis_points.jl

@@ -250,7 +250,7 @@ Remove all `AnalysisPoint`s in `sys` and any of its subsystems, replacing them b
 """
 function remove_analysis_points(sys::AbstractSystem)
     eqs = map(get_eqs(sys)) do eq
-        eq.lhs isa AnalysisPoint ? to_connection(eq.rhs) : eq
+        value(eq.lhs) isa AnalysisPoint ? to_connection(value(eq.rhs)) : eq
     end
     @set! sys.eqs = eqs
     @set! sys.systems = map(remove_analysis_points, get_systems(sys))

src/systems/connectors.jl

@@ -632,8 +632,8 @@ function returned from `generate_isouter`.
 """
 function handle_maybe_connect_equation!(eqs, state::AbstractConnectionState,
         eq::Equation, namespace::Vector{Symbol}, isouter)
-    lhs = eq.lhs
-    rhs = eq.rhs
+    lhs = value(eq.lhs)
+    rhs = value(eq.rhs)
 
     if !(lhs isa Connection)
         # split connections and equations