Every service template now pulls version strings, cluster/node UUIDs, auth
salts, greeting banners, and uptime from the seeded per-instance RNG instead
of hard-coded defaults. Scanners sweeping the fleet now see legitimately
diverging fingerprints per decky while each decky's own responses stay
internally consistent across restarts.
Covers elasticsearch, ftp, http, https, ldap, mongodb, mqtt, mssql, mysql,
postgres, redis, and smtp templates.
The docker build contexts and syslog_bridge.py lived at repo root, which
meant setuptools (include = ["decnet*"]) never shipped them. Agents
installed via `pip install $RELEASE_DIR` got site-packages/decnet/** but no
templates/, so every deploy blew up in deployer._sync_logging_helper with
FileNotFoundError on templates/syslog_bridge.py.
Move templates/ -> decnet/templates/ and declare it as setuptools
package-data. Path resolutions in services/*.py and engine/deployer.py drop
one .parent since templates now lives beside the code. Test fixtures,
bandit exclude path, and coverage omit glob updated to match.
