ci: use shared external types action

.github/workflows/lint.yml

@@ -72,3 +72,13 @@ jobs:
         env:
           RUSTDOCFLAGS: "-D warnings"
         run: cargo doc --no-deps --all-features --workspace
+
+  external-types:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+        with:
+          persist-credentials: false
+
+      - uses: x52dev/actions/cargo-workspace-check-external-types@8dc0274800321d780097bc9b3b1ffa9f8dfb1e8b

justfile

@@ -4,7 +4,6 @@ _list:
     @just --list
 
 toolchain := ""
-external-types-toolchain := "nightly-2026-03-20"
 # Format project
 fmt:
     just --unstable --fmt
@@ -22,18 +21,6 @@ check:
     fd --hidden -e=toml --exec-batch taplo lint
     cargo shear
 
-[private]
-workspace-crate-manifests:
-    @cargo metadata --no-deps --format-version=1 \
-        | jq -r '(.workspace_root + "/") as $root | .workspace_members as $members | .packages[] | select(.id as $id | $members | index($id)) | .manifest_path | ltrimstr($root)'
-
-# Check crates are not leaking unexpected external types
-check-external-types:
-    just workspace-crate-manifests \
-        | while IFS= read -r manifest; do \
-            cargo +{{ external-types-toolchain }} check-external-types --manifest-path "$manifest"; \
-        done
-
 # Lint workspace with Clippy
 clippy:
     cargo {{ toolchain }} clippy --workspace --all-targets --all-features