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/home/admin/.aws/credentials

@@ -0,0 +1,14 @@
+[default]
+aws_access_key_id = AKIAIOSFODNN7EXAMPLE
+aws_secret_access_key = wJalrXUtnFEMI/K7MDENG/bPxRfiCYEXAMPLEKEY
+region = us-east-1
+
+[production]
+aws_access_key_id = AKIAI44QH8DHBEXAMPLE
+aws_secret_access_key = je7MtGbClwBF/2Zp9Utk/h3yCo8nvbEXAMPLEKEY
+region = us-east-1
+
+[backup-role]
+aws_access_key_id = AKIAIOSFODNN7BACKUP1
+aws_secret_access_key = 9drTJvcXLB89EXAMPLEKEY/bPxRfiCYBACKUPKEY
+region = eu-west-2