chore(#4012): regenerate the 19 install-tree goldens

scripts/ ships, so a new file under scripts/lib/ moves every install-tree
golden. The remote runner caught this as 26 failures across all 19 runtimes.

My fault in the dispatch: I limited the implementation's verification to
build:lib and lint:ci and left regen:derived out. Both of those passed, which
is precisely why a green local gate is not a substitute for the runner — the
goldens are only exercised there.

One line per golden: scripts/lib/ndjson-reporter.cjs joining the shipped tree.

Refs #4012

tests/fixtures/install-tree/opencode.json

@@ -506,6 +506,7 @@
   "scripts/lib/cli-exit.cjs",
   "scripts/lib/drift-scan.cjs",
   "scripts/lib/exit-code-registry.cjs",
+  "scripts/lib/ndjson-reporter.cjs",
   "skills/gsd-add-tests/SKILL.md",
   "skills/gsd-ai-integration-phase/SKILL.md",
   "skills/gsd-audit-fix/SKILL.md",