Parse LFS Pointers Quickly

sow-tools no longer relies on git lfs ls-files --json for planning. It
now parses the checked-out LFS pointer files directly, so split sizing
and content_hash use the real LFS oid and size.

internal/pipeline/pipeline_test.go

@@ -1831,7 +1831,7 @@ func TestPlanHAKChunksPutsNewestAssetsInLastChunk(t *testing.T) {
 		t.Fatalf("scan: %v", err)
 	}
 
-	assets, err := collectAssetResources(p)
+	assets, err := collectAssetResources(p, false)
 	if err != nil {
 		t.Fatalf("collect asset resources: %v", err)
 	}
@@ -2109,6 +2109,12 @@ func TestCompareFailsWhenBuildIsStale(t *testing.T) {
 	if _, err := BuildModule(p); err != nil {
 		t.Fatalf("build module: %v", err)
 	}
+	modulePath := filepath.Join(root, "build", "testmod.mod")
+	moduleInfo, err := os.Stat(modulePath)
+	if err != nil {
+		t.Fatalf("stat built module: %v", err)
+	}
+	staleSourceTime := moduleInfo.ModTime().Add(2 * time.Second)
 	mustWriteFile(t, filepath.Join(root, "src", "module", "module.ifo.json"), `{
   "file_type": "IFO ",
   "file_version": "V3.2",
@@ -2124,6 +2130,9 @@ func TestCompareFailsWhenBuildIsStale(t *testing.T) {
   }
 }
 `)
+	if err := os.Chtimes(filepath.Join(root, "src", "module", "module.ifo.json"), staleSourceTime, staleSourceTime); err != nil {
+		t.Fatalf("chtimes updated source: %v", err)
+	}
 	if err := p.Scan(); err != nil {
 		t.Fatalf("rescan: %v", err)
 	}