fix(javascript): preserve source facts across graph projections

src/application/javascript/JavaScriptArtifactGraphContext.ts

@@ -379,6 +379,13 @@ export const javascriptAnalysisCoverage = (
     ? completeApplicationCoverage()
     : partialApplicationCoverage([], null);
 
+/** Parsed inventory identity shared by whole-file graph representations. */
+export const fileOccurrenceIdentity = (file: JavaScriptArtifactFile) => ({
+  container_sha256: file.container_sha256,
+  path: file.path,
+  sha256: file.sha256,
+});
+
 /** Stable identity for a fact scoped to one exact artifact. */
 export const artifactLocalIdentity = (
   sha256: string,

src/application/javascript/JavaScriptArtifactGraphStructure.ts

@@ -25,6 +25,7 @@ import {
   dependencyManifest,
   addUnavailableStaticParseScope,
   artifactFileNodeKind,
+  fileOccurrenceIdentity,
   artifactLocalIdentity,
   javascriptAnalysisCoverage,
   createElectronRoleNode,
@@ -603,6 +604,7 @@ const createFileTarget = (
       {
         label: file.path,
         properties: {
+          file_occurrence: fileOccurrenceIdentity(file),
           path: file.path,
           bytes: file.bytes,
           inventory_artifact_id: file.inventory_artifact_id,

src/application/javascript/JavaScriptModuleRelationships.ts

@@ -23,6 +23,7 @@ import type { JavaScriptArtifactFile } from "../../domain/javascript/javascriptA
 import {
   addAstContainsEdge,
   artifactLocalIdentity,
+  fileOccurrenceIdentity,
   type JavaScriptArtifactGraphContext,
   type JavaScriptArtifactGraphCoverage,
 } from "./JavaScriptArtifactGraphContext.js";
@@ -106,6 +107,7 @@ export const addJavaScriptSourceModules = (
           label: file.path,
           properties: {
             semantic_role: "source-module",
+            file_occurrence: fileOccurrenceIdentity(file),
             source_sha256: file.sha256,
             path: file.path,
             logical_module_key: file.path,
@@ -202,6 +204,7 @@ const addExportRelationship = (
         label: `${file.path}:${link.exportedName}`,
         properties: {
           semantic_role: "export-binding",
+          file_occurrence: fileOccurrenceIdentity(file),
           module_path: file.path,
           relationship_kind: link.kind,
           exported_name: link.exportedName,