refactor(domain): consolidate canonical ordering and digest helpers (#624)

* refactor(domain): consolidate canonical ordering and digest helpers

Single owner for code-point ordering (domain/canonicalOrdering.ts)
and canonical JSON digests (domain/comparisonSemantics.ts). Delete
all local compareCodePoints/compareText/digestCanonical duplicates
and migrate every importer. No re-export shims.

* fix(ci): allow slower real browser startup

src/application/JavaScriptArtifactFiles.ts

@@ -2,6 +2,7 @@ import { createHash } from "node:crypto";
 import { isAbsolute } from "node:path";
 import type { Readable } from "node:stream";
 
+import { compareCodePoints } from "../domain/canonicalOrdering.js";
 import { AsarArtifactReader } from "../artifacts/AsarArtifactReader.js";
 import {
   ArtifactPathRegistry,
@@ -331,6 +332,3 @@ const abortIfNeeded = (signal?: AbortSignal): void => {
       "JavaScript artifact reconstruction cancelled",
     );
 };
-
-const compareCodePoints = (left: string, right: string): number =>
-  left < right ? -1 : left > right ? 1 : 0;