B3.3 follow-up: drop _unitView mirror; use UnitPolicy property bags directly

Same as MGC — UnitPolicy property bags replace the manual _unitView/
unitPolicyView reassignment. specificClass.js 400→377. 196/196 tests
still pass.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

test/edge/nodeClass-routing.edge.test.js

@@ -106,7 +106,7 @@ test('source.getStatusBadge shows warning when pressure inputs are not initializ
     state: { getCurrentState: () => 'operational', getCurrentPosition: () => 50 },
     pressureInit: { getStatus: () => ({ initialized: false, hasUpstream: false, hasDownstream: false, hasDifferential: false }) },
     measurements: { type() { return { variant() { return { position() { return { getCurrentValue() { return 0; } }; } }; } }; } },
-    unitPolicyView: { output: { flow: 'm3/h' } },
+    unitPolicy: { output: { flow: 'm3/h' } },
     logger: { error: () => {} },
   };
   // Import the buildStatusBadge helper directly — it's the same code the