Add [CTRL-TIMING] logs to controller create_node flow

Timing logs cover:
- create_node_from_template (entry, get_template, add_node, total)
- add_node_from_template (entry to done)
- _create_node (project_setup, node.create, total)
- Node.create (compute_post timing)
- compute._session.request (actual HTTP to compute)

gns3server/api/routes/controller/projects.py

@@ -609,11 +609,21 @@ async def create_node_from_template(
 
     Required privilege: Node.Allocate
     """
+    import time as _time
+    _t0 = _time.time()
+    log.info(f"[CTRL-TIMING] create_node_from_template ENTER template_id={template_id}")
 
     template = await TemplatesService(templates_repo).get_template(template_id)
+    log.info(f"[CTRL-TIMING] get_template done elapsed={_time.time()-_t0:.3f}s")
+
     controller = Controller.instance()
     project = controller.get_project(str(project_id))
+
     node = await project.add_node_from_template(
         template, x=template_usage.x, y=template_usage.y, compute_id=template_usage.compute_id
     )
-    return node.asdict()
+    log.info(f"[CTRL-TIMING] add_node_from_template done elapsed={_time.time()-_t0:.3f}s")
+
+    result = node.asdict()
+    log.info(f"[CTRL-TIMING] create_node_from_template DONE total={_time.time()-_t0:.3f}s")
+    return result