Each decky now gets a deterministic-per-instance seeded RNG derived from
NODE_NAME, so cluster UUIDs, version strings, uptime, and credentials diverge
across the fleet while staying stable within one container. The canonical
helper lives at decnet/templates/instance_seed.py; the deployer copies it into
every active template build context alongside syslog_bridge.py. Dockerfiles
COPY it to /opt/ so server.py can import it.
Connection-time jitter intentionally stays unseeded — two hits to the same
decky must not replay the same latency curve.
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.
