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-labels.mjs

@@ -86,14 +86,6 @@ function percentile(values, pct) {
   return sorted[Math.min(sorted.length - 1, Math.ceil(sorted.length * pct) - 1)];
 }
 
-function parseJson(value, fallback) {
-  try {
-    return JSON.parse(value);
-  } catch {
-    return fallback;
-  }
-}
-
 function analyzeMembership(samples) {
   let replacements = 0;
   let exposure = 0;