🧪 Pass Codecov token to reusable linters job

v4 demands that it's present and if not passed explicitly, GitHub
Actions shields access to the repo secrets in reusable workflow.
This results in an empty string being passed to the action and
subsequently erroring out with a "no token found".

.github/workflows/ci-cd.yml

@@ -110,6 +110,8 @@ jobs:
 
   lint:
     uses: ./.github/workflows/reusable-linters.yml
+    secrets:
+      codecov-token: ${{ secrets.CODECOV_TOKEN }}
 
   build-wheels-for-tested-arches:
     name: Build wheels on ${{ matrix.os }}

.github/workflows/reusable-linters.yml

@@ -4,6 +4,10 @@ name: Linters
 
 on:
   workflow_call:
+    secrets:
+      codecov-token:
+        description: Mandatory token for uploading to Codecov
+        required: true
 
 env:
   COLOR: >-  # Supposedly, pytest or coveragepy use this
@@ -59,7 +63,7 @@ jobs:
     - name: Send coverage data to Codecov
       uses: codecov/codecov-action@v4
       with:
-        token: ${{ secrets.CODECOV_TOKEN }}
+        token: ${{ secrets.codecov-token }}
         files: >-
           .tox/.tmp/.mypy/python-3.13/cobertura.xml,
           .tox/.tmp/.mypy/python-3.11/cobertura.xml,