fix: Replace UTF-8 em-dash with ASCII hyphen in CLI output and tests

Replace em-dash (—) with ASCII hyphen (-) in:
- bin/disinto: 'Dry run complete' message
- bin/disinto: import skip message
- lib/init/nomad/cluster-up.sh: 'Dry run complete' message
- tests/disinto-init-nomad.bats: test assertions

This fixes CI failures caused by bats test runner not handling UTF-8
em-dash characters correctly.

bin/disinto

@@ -723,7 +723,7 @@ _disinto_init_nomad() {
       echo "[auth] [dry-run] ${vault_auth_sh}"
       echo ""
     else
-      echo "[import] no --import-env/--import-sops — skipping; set them or seed kv/disinto/* manually before deploying secret-dependent services"
+      echo "[import] no --import-env/--import-sops - skipping; set them or seed kv/disinto/* manually before deploying secret-dependent services"
       echo ""
     fi
 
@@ -818,7 +818,7 @@ _disinto_init_nomad() {
       sudo -n -- "${import_cmd[@]}" || exit $?
     fi
   else
-    echo "[import] no --import-env/--import-sops — skipping; set them or seed kv/disinto/* manually before deploying secret-dependent services"
+    echo "[import] no --import-env/--import-sops - skipping; set them or seed kv/disinto/* manually before deploying secret-dependent services"
   fi
 
   # Deploy services if requested
@@ -1134,7 +1134,7 @@ p.write_text(text)
     echo "[ensure] CLAUDE_CONFIG_DIR"
     echo "[ensure] state files (.dev-active, .reviewer-active, .gardener-active)"
     echo ""
-    echo "Dry run complete — no changes made."
+    echo "Dry run complete - no changes made."
     exit 0
   fi