Implement final changes from the code quality and deduplication opportunity audit

internal/adapters/storage/fake_test.go

@@ -9,30 +9,6 @@ import (
 	"testing"
 )
 
-func TestFakeBackendCapturesRequestAndReturnsItems(t *testing.T) {
-	fake := &FakeBackend{}
-	req := ArchiveRequest{SessionID: "s1", Items: []ArchiveItem{{Kind: "artifact", LocalPath: "artifacts/log.md"}}}
-
-	res, err := fake.Archive(context.Background(), req)
-	if err != nil {
-		t.Fatalf("Archive() error = %v", err)
-	}
-	if len(fake.Requests) != 1 || fake.Requests[0].SessionID != "s1" {
-		t.Fatalf("requests = %#v, want captured request", fake.Requests)
-	}
-	if len(res.Archived) != 1 {
-		t.Fatalf("archived len = %d, want 1", len(res.Archived))
-	}
-}
-
-func TestFakeBackendError(t *testing.T) {
-	fake := &FakeBackend{Err: errors.New("boom")}
-	_, err := fake.Archive(context.Background(), ArchiveRequest{})
-	if err == nil {
-		t.Fatal("expected error, got nil")
-	}
-}
-
 func TestFakeBackendListPrefixFiltering(t *testing.T) {
 	fake := &FakeBackend{}
 	fake.SeedObject(FakeObject{Key: "dnd/campaigns/forsaken/audio/a.flac", Data: []byte("a")})