v1.29.0: jump host is core + fix fresh-install setup.sh abort (#125)

Two fresh-install fixes and promote the SSH jump host from opt-in to core.

setup.sh: fix silent abort after "Minting per-app OpenBao tokens". env_get's
grep|cut pipeline returns non-zero under set -euo pipefail when .env exists
(created by the root VAULT_TOKEN env_upsert) but an app-token key is absent
(the normal first-run state); the unguarded existing assignment from env_get
then tripped set -e and killed the script before minting any token. env_get
now always returns 0 (|| true). Reproduced + verified under the exact condition.

jump host is no longer optional:
- docker-compose.yml: drop profiles jump-host from the jump-host service
  (always started); rename the opt-in test fixture profile jump-host to ldap-test.
- setup.sh: SUBMODULES always includes jump-host; build/start/register/summary
  no longer guarded by JUMP_ENABLED; drop the COMPOSE_PROFILES export.
- bootstrap.js: jump provisioning + directory record run unconditionally.
- setup.env.example/docs: drop optional/CFG_JUMP_HOST_ENABLED wording.

Co-authored-by: Claude <noreply@anthropic.com>

docs/quickstart.md

@@ -60,8 +60,7 @@ setups `CFG_DOMAIN` is the only value you set:
 | `CFG_ADMIN_UID` | `admin` | optional, defaults to `admin` |
 | `CFG_ADMIN_EMAIL` | `admin@<proxyHost>` | optional |
 | `CFG_BASE_DN` | `dc=lab,dc=local` | advanced: override the derived LDAP base DN |
-| `CFG_JUMP_HOST_ENABLED` | `true` | optional: bring up the [SSH jump host](https://theta42.github.io/jump-host/) (default off) |
-| `CFG_JUMP_HOST` | `jump.lab.local` | optional, defaults to `jump.<domain>` |
+| `CFG_JUMP_HOST` | `jump.lab.local` | optional, defaults to `jump.<domain>` (the [SSH jump host](https://theta42.github.io/jump-host/) is installed + started by default) |
 | `JUMP_SSH_PORT` | `2222` | optional: host port for the jump host's SSH (never 22 by default) |
 
 `setup.env` is used **only on the first run** to generate `./config/`; after