Install n8n past its unsatisfiable canvas dependencies (#18439)

n8n-nodes-base 2.46.0 moved @napi-rs/canvas-linux-arm64-musl and
-linux-x64-musl from optional into hard dependencies. npm enforces
os/cpu/libc on those, and no combination satisfies both arm64 and x64,
so every install fails with EBADPLATFORM. n8n 2.46.4 reached the latest
tag on 2026-11-03 and the failures started four minutes later.

--force skips the platform check. The matching gnu binary is still
installed through @napi-rs/canvas's own optional dependencies, so canvas
keeps working.

ct/n8n.sh

@@ -46,7 +46,10 @@ EOF
     systemctl daemon-reload
   fi
 
-  $STD npm install -g n8n@latest
+  # n8n-nodes-base 2.46.0 pins both @napi-rs/canvas musl binaries as hard
+  # dependencies, which no os/cpu/libc combination can satisfy. Drop --force
+  # once upstream makes them optional again.
+  $STD npm install -g n8n@latest --force
   systemctl restart n8n
   msg_ok "Updated n8n"
   msg_ok "Updated successfully!"