fix(native): keep truncated empty class-import scans partial (#6153)

* fix(native): keep truncated empty class-import scans partial

An explicitly present empty objc_class_import_addresses list with
objc_class_import_addresses_complete false reported binding coverage as
not_requested with a null reason, discarding the caller's declaration that
the candidate scan was truncated. Only an omitted list, or an empty list
declared complete, is not a request; a truncated empty scan now reports
partial coverage with the existing record-budget reason and zero examined
and decoded addresses.

Refs #6086

* test(native): cover empty truncated class-import candidate scans

Refs #6086

src/native/AppleObjcClassImportBindings.test.ts

@@ -201,4 +201,25 @@ describe("Objective-C import binding address inspection", () => {
       },
     });
   });
+
+  it("keeps an explicitly truncated empty candidate scan partial", () => {
+    expect(
+      inspectObjcClassImportBindings(
+        createInput({ addresses: [], addressesComplete: false }),
+      ),
+    ).toMatchObject({
+      bindings: [],
+      coverage: {
+        status: "partial",
+        examined: 0,
+        decoded: 0,
+        reason: expect.stringContaining("max_records limit"),
+      },
+    });
+    expect(
+      inspectObjcClassImportBindings(
+        createInput({ addresses: [], addressesComplete: true }),
+      ).coverage,
+    ).toMatchObject({ status: "not_requested", reason: null, examined: 0 });
+  });
 });

src/native/AppleObjcClassImportBindings.ts

@@ -23,7 +23,9 @@ export const inspectObjcClassImportBindings = (input: {
 }): ObjcClassImportBindingScan => {
   const { bytes, layout, fixups, addresses, addressesComplete, maxRecords } =
     input;
-  if (addresses === undefined || addresses.length === 0)
+  // An explicitly truncated candidate scan keeps its limitation even when no
+  // candidate was retained.
+  if (addresses === undefined || (addresses.length === 0 && addressesComplete))
     return {
       bindings: [],
       coverage: {