refactor: remove redundant seams and preserve cleanup ownership (#10375)

* refactor: remove redundant seams and preserve cleanup ownership

* fix: validate PE resource extents before budget checks

src/domain/unicodeCodePointOrder.ts

@@ -18,9 +18,9 @@ export const compareUnicodeCodePoints = (
 };
 
 /**
- * Collision-free composite key for deduplication/sorting. `\0`-joins
- * collide when any component contains NUL (valid in JS property names);
- * a JSON tuple escapes every component. Single owner for composite keys.
+ * JSON tuple key for deduplication/sorting. Unlike `\0`-joins, it preserves
+ * boundaries when string components contain NUL. Callers must account for JSON
+ * serialization semantics, such as undefined array elements becoming null.
  */
 export const compositeKey = (parts: readonly unknown[]): string =>
   JSON.stringify(parts);