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/elasticsearch/server.py

@@ -0,0 +1,123 @@
+#!/usr/bin/env python3
+"""
+Elasticsearch server — presents a convincing ES 7.x HTTP API on port 9200.
+Logs all requests (especially recon probes like /_cat/, /_cluster/, /_nodes/)
+as JSON. Designed to attract automated scanners and credential stuffers.
+"""
+
+import json
+import os
+from http.server import BaseHTTPRequestHandler, HTTPServer
+from syslog_bridge import syslog_line, write_syslog_file, forward_syslog
+
+NODE_NAME = os.environ.get("NODE_NAME", "esserver")
+SERVICE_NAME   = "elasticsearch"
+LOG_TARGET = os.environ.get("LOG_TARGET", "")
+
+_CLUSTER_UUID = "xC3Pr9abTq2mNkOeLvXwYA"
+_NODE_UUID = "dJH7Lm2sRqWvPn0kFiEtBo"
+
+_ROOT_RESPONSE = {
+    "name": NODE_NAME,
+    "cluster_name": "elasticsearch",
+    "cluster_uuid": _CLUSTER_UUID,
+    "version": {
+        "number": "7.17.9",
+        "build_flavor": "default",
+        "build_type": "docker",
+        "build_hash": "ef48222227ee6b9e70e502f0f0daa52435ee634d",
+        "build_date": "2023-01-31T05:34:43.305517834Z",
+        "build_snapshot": False,
+        "lucene_version": "8.11.1",
+        "minimum_wire_compatibility_version": "6.8.0",
+        "minimum_index_compatibility_version": "6.0.0-beta1",
+    },
+    "tagline": "You Know, for Search",
+}
+
+
+
+
+def _log(event_type: str, severity: int = 6, **kwargs) -> None:
+    line = syslog_line(SERVICE_NAME, NODE_NAME, event_type, severity, **kwargs)
+    write_syslog_file(line)
+    forward_syslog(line, LOG_TARGET)
+
+
+class ESHandler(BaseHTTPRequestHandler):
+    server_version = "elasticsearch"
+    sys_version = ""
+
+    def _send_json(self, code: int, data: dict) -> None:
+        body = json.dumps(data).encode()
+        self.send_response(code)
+        self.send_header("Content-Type", "application/json; charset=UTF-8")
+        self.send_header("Content-Length", str(len(body)))
+        self.send_header("X-elastic-product", "Elasticsearch")
+        self.end_headers()
+        self.wfile.write(body)
+
+    def _read_body(self) -> str:
+        length = int(self.headers.get("Content-Length", 0))
+        return self.rfile.read(length).decode(errors="replace") if length else ""
+
+    def do_GET(self):
+        src = self.client_address[0]
+        path = self.path.split("?")[0]
+
+        if path in ("/", ""):
+            _log("root_probe", src=src, method="GET", path=self.path)
+            self._send_json(200, _ROOT_RESPONSE)
+        elif path.startswith("/_cat/"):
+            _log("cat_api", src=src, method="GET", path=self.path)
+            self._send_json(200, [])
+        elif path.startswith("/_cluster/"):
+            _log("cluster_recon", src=src, method="GET", path=self.path)
+            self._send_json(200, {"cluster_name": "elasticsearch", "status": "green",
+                                   "number_of_nodes": 3, "number_of_data_nodes": 3})
+        elif path.startswith("/_nodes"):
+            _log("nodes_recon", src=src, method="GET", path=self.path)
+            self._send_json(200, {"_nodes": {"total": 3, "successful": 3, "failed": 0}, "nodes": {}})
+        elif path.startswith("/_security/") or path.startswith("/_xpack/"):
+            _log("security_probe", src=src, method="GET", path=self.path)
+            self._send_json(200, {"enabled": True, "available": True})
+        else:
+            _log("request", src=src, method="GET", path=self.path)
+            self._send_json(404, {"error": {"root_cause": [{"type": "index_not_found_exception",
+                                                             "reason": "no such index"}]}})
+
+    def do_POST(self):
+        src = self.client_address[0]
+        body = self._read_body()
+        path = self.path.split("?")[0]
+        _log("post_request", src=src, method="POST", path=self.path,
+             body_preview=body[:300], user_agent=self.headers.get("User-Agent", ""))
+        if "_search" in path or "_bulk" in path:
+            self._send_json(200, {"took": 1, "timed_out": False, "hits": {"total": {"value": 0}, "hits": []}})
+        else:
+            self._send_json(200, {"result": "created", "_id": "1", "_index": "server"})
+
+    def do_PUT(self):
+        src = self.client_address[0]
+        body = self._read_body()
+        _log("put_request", src=src, method="PUT", path=self.path, body_preview=body[:300])
+        self._send_json(200, {"acknowledged": True})
+
+    def do_DELETE(self):
+        src = self.client_address[0]
+        _log("delete_request", src=src, method="DELETE", path=self.path)
+        self._send_json(200, {"acknowledged": True})
+
+    def do_HEAD(self):
+        src = self.client_address[0]
+        _log("head_request", src=src, method="HEAD", path=self.path)
+        self._send_json(200, {})
+
+    def log_message(self, fmt, *args):
+        pass  # suppress default HTTP server logging
+
+
+if __name__ == "__main__":
+    _log("startup", msg=f"Elasticsearch server starting as {NODE_NAME}")
+    server = HTTPServer(("0.0.0.0", 9200), ESHandler)  # nosec B104
+    server.serve_forever()