fix(javascript): preserve effective child-process stdio options (#4336)

* fix(javascript): preserve effective child-process stdio options

* fix(javascript): retain proven callbacks and primitive stdio keys

* fix(javascript): preserve argv shapes and nullish spreads

* fix(javascript): bound callable proofs and retain exposed binding uncertainty

* test(javascript): keep callback acceptance within transport budget

* test(javascript): inspect application coverage for callback proof limits

* fix(javascript): keep spread command argument slots uncertain

* fix(javascript): bound mapped argument content proofs

* fix(javascript): distinguish erased declarations from runtime shadows

* fix(javascript): prove runtime module context before binding isolation

* fix(javascript): share erased declaration and opaque scope proofs

* fix(javascript): keep lowered enum scopes opaque

* fix(javascript): narrow stdio proofs and consolidate regressions

* perf(javascript): reuse lexical references for child shapes

* fix(javascript): retain CommonJS child argument context

* fix(javascript): keep Annex B affected child arguments unknown

* fix(javascript): recognize value import-equals runtime modules

* fix(javascript): retain exact stdio through module and primitive syntax

* fix(javascript): bound inline spread property resolution

* fix(javascript): distinguish copied methods from getters

src/application/javascript/JavaScriptSemanticGraphChildProcessProjection.ts

@@ -21,7 +21,9 @@ interface ChildUnknownInput {
     | "forwards-signal"
     | "listens-exit"
     | "listens-error"
+    | "connects-stdio"
   )[];
+  readonly reason?: "unknown-value";
   readonly detail: string;
   readonly candidateNodeIds: readonly string[];
 }
@@ -113,6 +115,16 @@ const projectSpawn = (
     relation: "connects-stdio",
     resolution: spawn.stdioMode === "dynamic" ? "candidate" : "resolved",
   });
+  if (spawn.stdioMode === "dynamic")
+    addChildUnknown({
+      context,
+      node: child,
+      location: spawn.location,
+      relationKinds: ["connects-stdio"],
+      reason: "unknown-value",
+      detail: `Static ${spawn.method} stdio options remain unresolved.`,
+      candidateNodeIds: [],
+    });
   if (spawn.resolution !== "complete")
     addChildUnknown({
       context,
@@ -228,7 +240,7 @@ const addChildUnknown = (input: ChildUnknownInput): void => {
         node_id: node?.node_id ?? null,
         family: "child-process",
         relation_kinds: relationKinds,
-        reason: "ambiguous-target",
+        reason: input.reason ?? "ambiguous-target",
         detail,
         candidate_node_ids: candidateNodeIds,
         evidence: unknownSemanticEvidence(context.file, location),