chore: remove deprecated flow_boundary and update docs to match new architecture

patch.py

@@ -0,0 +1,68 @@
+import re
+
+with open("crates/components/src/heat_exchanger/exchanger.rs", "r") as f:
+    content = f.read()
+
+# Add getters for hot/cold conditions
+content = content.replace("pub fn hot_fluid_id(&self) -> Option<&FluidsFluidId> {",
+"""pub fn hot_conditions(&self) -> Option<&HxSideConditions> {
+        self.hot_conditions.as_ref()
+    }
+
+    pub fn cold_conditions(&self) -> Option<&HxSideConditions> {
+        self.cold_conditions.as_ref()
+    }
+
+    pub fn hot_fluid_id(&self) -> Option<&FluidsFluidId> {""")
+
+
+# Add compute_residuals_with_ua_scale
+# Find compute_residuals inside impl Component
+# We'll just add a method to `impl<Model: HeatTransferModel> HeatExchanger<Model>`
+method_to_add = """
+    pub fn compute_residuals_with_ua_scale(
+        &self,
+        _state: &StateSlice,
+        residuals: &mut ResidualVector,
+        custom_ua_scale: f64,
+    ) -> Result<(), ComponentError> {
+        self.do_compute_residuals(_state, residuals, Some(custom_ua_scale))
+    }
+"""
+content = content.replace("impl<Model: HeatTransferModel + 'static> Component for HeatExchanger<Model> {",
+method_to_add + "\nimpl<Model: HeatTransferModel + 'static> Component for HeatExchanger<Model> {")
+
+# Then modify compute_residuals to call do_compute_residuals
+content = content.replace("fn compute_residuals(", "fn do_compute_residuals(\n        &self,\n        _state: &StateSlice,\n        residuals: &mut ResidualVector,\n        custom_ua_scale: Option<f64>,\n    ) -> Result<(), ComponentError> {\n        if residuals.len() < self.n_equations() {")
+
+# Wait, replace the top of compute_residuals:
+old_start = """    fn compute_residuals(
+        &self,
+        _state: &StateSlice,
+        residuals: &mut ResidualVector,
+    ) -> Result<(), ComponentError> {"""
+
+new_start = """    fn compute_residuals(
+        &self,
+        _state: &StateSlice,
+        residuals: &mut ResidualVector,
+    ) -> Result<(), ComponentError> {
+        self.do_compute_residuals(_state, residuals, None)
+    }
+
+    fn do_compute_residuals(
+        &self,
+        _state: &StateSlice,
+        residuals: &mut ResidualVector,
+        custom_ua_scale: Option<f64>,
+    ) -> Result<(), ComponentError> {"""
+
+content = content.replace(old_start, new_start)
+
+# inside do_compute_residuals, replace `let dynamic_f_ua = self.calib_indices.f_ua.map(|idx| _state[idx]);`
+old_f_ua = "let dynamic_f_ua = self.calib_indices.f_ua.map(|idx| _state[idx]);"
+new_f_ua = "let dynamic_f_ua = custom_ua_scale.or_else(|| self.calib_indices.f_ua.map(|idx| _state[idx]));"
+content = content.replace(old_f_ua, new_f_ua)
+
+with open("crates/components/src/heat_exchanger/exchanger.rs", "w") as f:
+    f.write(content)