chore: remove unused imports and local helpers

Drop module-local helpers that nothing calls (linkAbort, summarize,
stringOption, summarizeEntity and the polygonCenter, propertyObject and
unwrapProperties helpers only it used, CALLOUT_DOT_SIZE_PX) and unused
import specifiers in runtime modules, tests, QA scripts and tools.

None of the removed bindings is exported. Re-exports such as the ALPR
policy constants and every package export are unchanged.

scripts/qa-transit.mjs

@@ -47,8 +47,6 @@ import {
   reduceScenario,
   reduceSensorContrast,
   reduceScriptedMotion,
-  reduceMotion,
-  reduceFleet,
 } from '../src/layers/transit/qaMetrics.js';
 
 const BASE = process.env.QA_BASE_URL || 'http://localhost:4173';