Wire BPHX channel pressure drop on both sides with selectable correlations.

Replace isobaric 4-port closures with SimplifiedChannel (default) and Martin1996 DP models so z_dp and UI dp_correlation actually affect the Newton solve.

Co-authored-by: Cursor <cursoragent@cursor.com>

crates/cli/tests/single_run.rs

@@ -29,7 +29,7 @@ fn test_simulation_result_serialization() {
         initialization_diagnostics: None,
         dof: None,
         elapsed_ms: 50,
-        raw_state_vector: None,
+        raw_state_vector: None, solved_variables: Vec::new(),
     };
 
     let json = serde_json::to_string_pretty(&result).unwrap();
@@ -70,7 +70,7 @@ fn test_error_result_serialization() {
         initialization_diagnostics: None,
         dof: None,
         elapsed_ms: 0,
-        raw_state_vector: None,
+        raw_state_vector: None, solved_variables: Vec::new(),
     };
 
     let json = serde_json::to_string(&result).unwrap();
@@ -96,7 +96,7 @@ fn test_error_result_serializes_failure_diagnostics() {
         initialization_diagnostics: None,
         dof: None,
         elapsed_ms: 0,
-        raw_state_vector: None,
+        raw_state_vector: None, solved_variables: Vec::new(),
     };
 
     let json = serde_json::to_string(&result).unwrap();
@@ -2303,7 +2303,7 @@ fn test_structural_failure_serializes_without_diagnostics() {
         initialization_diagnostics: None,
         dof: None,
         elapsed_ms: 0,
-        raw_state_vector: None,
+        raw_state_vector: None, solved_variables: Vec::new(),
     };
 
     let json = serde_json::to_string(&result).unwrap();
@@ -2348,7 +2348,7 @@ fn test_success_result_does_not_include_failure_diagnostics() {
         initialization_diagnostics: None,
         dof: None,
         elapsed_ms: 120,
-        raw_state_vector: None,
+        raw_state_vector: None, solved_variables: Vec::new(),
     };
 
     let json = serde_json::to_string(&result).unwrap();