fix(packaging): move templates/ into decnet/ package so they ship with pip install

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.

decnet/templates/cowrie/honeyfs/root/.bash_history

@@ -0,0 +1,22 @@
+whoami
+id
+uname -a
+cat /etc/passwd
+cat /etc/shadow
+ls /home
+ls /home/admin
+cat /home/admin/.bash_history
+cat /home/admin/.aws/credentials
+find / -name "*.pem" 2>/dev/null
+find / -name "id_rsa" 2>/dev/null
+find / -name "*.key" 2>/dev/null
+netstat -tunlp
+ss -tunlp
+iptables -L
+cat /etc/crontab
+crontab -l
+ps aux
+systemctl list-units
+cat /etc/mysql/my.cnf
+mysql -u root -p
+history -c