Release v1.3.70

Hostnames and certificates from the console: add a name, see whether it has a
certificate and for how long, and apply the list to the reverse proxy without
logging into the server.

Two numbers are skipped and both were my mistake, so they are named here rather
than left as gaps somebody has to work out later. v1.3.68 was cut while the
working directory was still inside the feature worktree, so it landed on the
branch instead of on main; this release carries it. v1.3.69 was pushed pointing
at v1.3.67's commit. Deleted rather than moved, both times: a published tag that
changes what it points at is worse than a number nobody uses.

This release needs one thing done once per server, because the root-owned helper
gained a verb:

  sudo bash deploy/install-agent.sh

and one line in /etc/caddy/Caddyfile:

  import /etc/caddy/clupilot-proxy-hosts.conf

The installer creates that file before anything imports it — an import of a
missing file makes the whole proxy configuration invalid, and that takes the
public site with it.

2035 tests pass.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

VERSION

@@ -1 +1 @@
-1.3.69
+1.3.70