Fix bugs from 5-2 code review

_bmad-output/implementation-artifacts/sprint-status.yaml

@@ -1,5 +1,5 @@
 # Sprint Status - Entropyk
-# Generated: 2026-02-13
+# Last Updated: 2026-02-21
 # Project: Entropyk
 # Project Key: NOKEY
 # Tracking System: file-system
@@ -53,6 +53,8 @@ development_status:
   1-8-auxiliary-and-transport-components: done
   1-9-air-coils-evaporator-condenser: done
   1-10-pipe-helpers-water-refrigerant: done
+  1-11-flow-junction-splitter-merger: done
+  1-12-flow-boundary-source-sink: done
   epic-1-retrospective: optional
 
   # Epic 2: Fluid Properties Backend
@@ -64,6 +66,7 @@ development_status:
   2-5-mixture-and-temperature-glide-support: done
   2-6-critical-point-damping-co2-r744: done
   2-7-incompressible-fluids-support: done
+  2-8-rich-thermodynamic-state-abstraction: done
   epic-2-retrospective: optional
 
   # Epic 3: System Topology (Graph)
@@ -73,7 +76,7 @@ development_status:
   3-3-multi-circuit-machine-definition: done
   3-4-thermal-coupling-between-circuits: done
   3-5-zero-flow-branch-handling: done
-  3-6-hierarchical-macro-components: ready-for-dev
+  3-6-hierarchical-macro-components: done
   epic-3-retrospective: optional
 
   # Epic 4: Intelligent Solver Engine
@@ -89,11 +92,12 @@ development_status:
   epic-4-retrospective: optional
 
   # Epic 5: Inverse Control & Optimization
-  epic-5: backlog
-  5-1-constraint-definition-framework: backlog
-  5-2-bounded-control-variables: backlog
-  5-3-residual-embedding-for-inverse-control: backlog
+  epic-5: in-progress
+  5-1-constraint-definition-framework: done
+  5-2-bounded-control-variables: done
+  5-3-residual-embedding-for-inverse-control: review
   5-4-multi-variable-control: backlog
+  5-5-swappable-calibration-variables: backlog
   epic-5-retrospective: optional
 
   # Epic 6: Multi-Platform APIs