extract news-digest into its own repo (vh/nevermore)

The applet outgrew "stack alongside the infra-management workspace" —
it has its own pyproject, multi-tenant deploy story, separate
release cadence, and isn't actually about managing infrastructure.
Lives at https://gitea.phasefinal.com/vh/nevermore now, with
provenance noted in its initial commit.

This commit removes:
  stacks/news-digest/             (full stack tree)
  playbooks/deploy-news-digest.yaml
  scripts/add-digest-user.sh

The existing ana-docker deployment continues running on its baked
local/news-digest:v5 image — nothing changes for the live install
until you choose to redeploy from the new repo. Migration steps
(rename data dir, redeploy, retire old compose dir) are in
nevermore's README.

Updated:
  README.md     — Current stacks listing now points at the new repo
  STATUS.md     — milestones entry for the extraction

STATUS.md

@@ -507,6 +507,20 @@ Side fix: moved `stacks/llama-swap/config.yaml` →
 the server layout (`stacks/<stack>/conf/<file>` →
 `/opt/docker/conf/<stack>/<file>`).
 
+## Session milestones — 2026-04-29 (Nevermore extraction)
+
+The news-digest applet was extracted into its own repo at
+[`vh/nevermore`](https://gitea.phasefinal.com/vh/nevermore) — clean
+break, fresh git history, renamed throughout (DIGEST_* → NEVERMORE_*,
+news-digest-* containers → nevermore-*, masthead → "Nevermore"). The
+existing `news-digest-*` deployment on ana-docker continues to run
+unchanged on its baked image; future updates come from the new repo.
+Migration path documented in nevermore's README.
+
+Removed from this workspace:
+  stacks/news-digest/, playbooks/deploy-news-digest.yaml,
+  scripts/add-digest-user.sh.
+
 ## Session milestones — 2026-04-28..29 (audio gen, digest applet, task-board polish, tooling)
 
 ### Audio generation on irv-ml1 (A6000)