fix(javascript): preserve graph facts across omissions and versions

Omit absent inventory facts without erasing explicit unknowns. Compare canonical file occurrences by source path and digest while preserving complete container provenance in observations and Evidence.

Consolidate candidate-capacity fixtures around unresolved alternatives and update inventory coverage and source-occurrence oracles. Preserve resource, identity, relationship uncertainty, cancellation, and transfer regressions.

src/application/javascript/JavaScriptSemanticGraphBuilder.test.ts

@@ -1,4 +1,7 @@
-import { primitiveByteExpansionSource } from "../../../tests/fixtures/javascriptPrimitiveExpansion.js";
+import {
+  primitiveByteExpansionSource,
+  primitiveCandidateExpansionExpression,
+} from "../../../tests/fixtures/javascriptPrimitiveExpansion.js";
 import { graphForJavaScript as graphFor } from "../../../tests/fixtures/javascriptSemanticGraph.js";
 import * as t from "@babel/types";
 import { expect, it } from "vitest";
@@ -250,8 +253,7 @@ it("keeps dynamic calls explicit and returns complete deterministic results", ()
 });
 
 it("preserves primitive candidate budget unknowns in semantic graph coverage", () => {
-  const term = '(true ? "a" : "b")';
-  const source = `const answer = ${Array.from({ length: 20 }, () => term).join(" + ")};`;
+  const source = `const answer = ${primitiveCandidateExpansionExpression()};`;
   const ir = analyzeJavaScriptSemantics(source);
   const graph = graphFor(source, ir);
 
@@ -287,8 +289,7 @@ it("preserves derived string-byte limit reasons in semantic graph unknowns", ()
 });
 
 it("retains resource-limit reasons at nested object property slots", () => {
-  const term = '(true ? "a" : "b")';
-  const source = `const answer = { nested: { value: ${Array.from({ length: 20 }, () => term).join(" + ")} } };`;
+  const source = `const answer = { nested: { value: ${primitiveCandidateExpansionExpression()} } };`;
   const ir = analyzeJavaScriptSemantics(source);
   const graph = graphFor(source, ir);