fix(agent): reuse a valid lease token across applies; a rate-limited lease no longer blocks a deploy; 0.1.6

Every apply requested a new lease, so a failing deploy retried by the 60 s
timer burned tenancy's 5-leases-per-hour budget and then failed on
LEASE_RATE_LIMITED forever (env-qa-02 pilot). Now: reuse a lease-derived
token while lookup-self says it is valid; swap the bootstrap token for a
lease once; if tenancy rate-limits the lease while a working token exists,
apply with it and defer the swap.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01KLB7jieMNRkTsJ2epr4Ds1

packaging/install.sh

@@ -3,9 +3,9 @@
 #
 #   T=<read-only GitLab deploy token, scope read_package_registry>   # from the install kit / OpenBao
 #   curl -sSf -H "DEPLOY-TOKEN: $T" \
-#     https://scm.tikali.ai/api/v4/projects/69/packages/generic/monky-deployd/0.1.5/install.sh \
+#     https://scm.tikali.ai/api/v4/projects/69/packages/generic/monky-deployd/0.1.6/install.sh \
 #     | sudo bash -s -- --env env-qa-02 --site cbs --token "$T" --bootstrap-file bootstrap.jwt \
-#     [--transport sdk|proxy|system] [--version 0.1.5] [--enrol-jwt /path/monky-host.env-qa-02.jwt] \
+#     [--transport sdk|proxy|system] [--version 0.1.6] [--enrol-jwt /path/monky-host.env-qa-02.jwt] \
 #     [--laptop] [--source gitlab|gitea] [--docker-data-root /home/docker-data]
 #
 # --token / MONKY_DEPLOYD_TOKEN: the GitLab project is PRIVATE (its parent groups are private, so it
@@ -29,7 +29,7 @@
 set -euo pipefail
 umask 077
 
-DEFAULT_VERSION="0.1.5"
+DEFAULT_VERSION="0.1.6"
 # Download source. PRIMARY is the GitLab project's generic package registry on scm.tikali.ai: inside
 # the estate gitea.cbs.tikali.net is split-horizon to jump1's RED EIP (10.10.0.175), which has no HTTP
 # ingress, so backend boxes cannot reach the Gitea mirror (cbs/iac#102); scm.tikali.ai they can. The