fix(javascript): isolate source analysis and retain bounded partial evidence (#1651)

* refactor(javascript): validate transferable file projections

* test(javascript): consume decoded module and static facts

* fix(javascript): isolate source analysis and retain bounded partial evidence

* test(javascript): verify cleanup retention and repeated source paths

src/domain/javascript/javascriptModuleSemanticIr.ts

@@ -0,0 +1,36 @@
+import type { JavaScriptSemanticIr } from "./javascriptSemanticIr.js";
+
+/** Module facts needed after file-local semantic projection has finished. */
+export type JavaScriptModuleSemanticIr = Pick<
+  JavaScriptSemanticIr,
+  | "scopes"
+  | "bindings"
+  | "callables"
+  | "moduleLinks"
+  | "coverage"
+  | "limitations"
+>;
+
+/** Retain facts consumed by source-module and export-return composition. */
+export const projectJavaScriptModuleSemantics = (
+  ir: JavaScriptSemanticIr,
+): JavaScriptModuleSemanticIr => {
+  const scopes = ir.scopes.filter(({ kind }) => kind === "program");
+  const programScopeId = scopes[0]?.scopeId;
+  const localNames = new Set(ir.moduleLinks.map(({ localName }) => localName));
+  const callableIds = new Set(
+    ir.moduleLinks.map(({ callableId }) => callableId),
+  );
+  return {
+    scopes,
+    bindings: ir.bindings.filter(
+      ({ name, scopeId }) => scopeId === programScopeId && localNames.has(name),
+    ),
+    callables: ir.callables.filter(({ callableId }) =>
+      callableIds.has(callableId),
+    ),
+    moduleLinks: ir.moduleLinks,
+    coverage: ir.coverage,
+    limitations: ir.limitations,
+  };
+};