dankserver: quadlet units + deploy handlers for romm trio, jellyfin, calibre-web, copyparty

Cutover of the six surviving dankserver services from compose-era bare
containers to boot-persistent Quadlet units (WantedBy=default.target; podman
5.x v1 generator honors it at user-manager start).

Units are faithful to live inspect ground truth (image pins = running tags,
not compose inventory):
- romm trio shares one data root: /home/dank/Containers/romm mounted whole at
  /romm; mariadb datadir and redis data dir live inside it. Aliases mariadb/
  redis preserved on dankserver_appnet via Network=...:alias=. Secrets stay in
  the host-local env file (EnvironmentFile + ${VAR} expansion in the generated
  ExecStart, gitea precedent). copyparty passes its admin account via
  Exec=-a ${COPAY_ACCOUNT}:${COPAY_PASSWORD} (Exec= not Command=: the v1
  generator hard-fails on Command=); entropy stays rw only there.
- jellyfin keeps every creation-time env as Environment= lines (zero drift);
  Device=/dev/dri + GroupAdd=keep-groups preserve hardware transcoding.
- calibre-web pins the exact running image tag (id 986277563e76 =
  0.6.27-ls397), pasta network preserved.

Deployer: first-cutover handlers retire the old container, rescue unshadowed
anonymous-volume content (podman volume export + tar --skip-old-files), mv
data roots on the same fs, then start units in dependency order with health
gates. Re-deploys restart only the selected unit. deploy-plan.py maps compose
keys mariadb/redis to the new unit names; allowlists updated. New seam test
tests/dankserver_quadlet.bats pins boot-persistence + v1-generator contract;
test-changed.sh maps the new dirs to it. Full suite green (209 tests).

scripts/test-changed.sh

@@ -205,6 +205,14 @@ for path in "${CHANGED[@]}"; do
         old/scripts/*|old/scripts/**)
             add_test tests/scripts_syntax.bats
             ;;
+        # Cutover-era dankserver quadlet units (romm trio, jellyfin, calibre-web,
+        # copyparty): the seam checks boot-persistence + v1-generator contract;
+        # deploy-flow seams guard the deployer routing that installs them.
+        dankserver/romm/*|dankserver/jellyfin/*|dankserver/calibre-web/*|dankserver/copyparty/*)
+            add_test tests/dankserver_quadlet.bats
+            add_test tests/deployment_flow.bats
+            add_test tests/deployment_scoping.bats
+            ;;
         report/*)
             # Frozen audit reports are point-in-time artifacts; not testable.
             ;;