Debug dependency caching on CI

Author: alco

.github/workflows/elixir_check_formatting.yml

@@ -54,10 +54,17 @@ jobs:
             !packages/${{ matrix.package }}/_build/*/lib/electric_telemetry
           key: "${{ runner.os }}-${{ matrix.package }}-build-${{ env.MIX_ENV }}-${{ hashFiles('packages/${{ matrix.package }}/mix.lock') }}"
           restore-keys: |
+            ${{ runner.os }}-${{ matrix.package }}-build-${{ env.MIX_ENV }}-${{ matrix.package }}
             ${{ runner.os }}-${{ matrix.package }}-build-${{ env.MIX_ENV }}-${{ hashFiles('packages/${{ matrix.package }}/mix.lock') }}
             ${{ runner.os }}-${{ matrix.package }}-build-${{ env.MIX_ENV }}-
             ${{ runner.os }}-${{ matrix.package }}-build-
 
+      - name: Debug
+        run: |
+          ls -l deps
+          ls -l _build || true
+          ls -l _build/* || true
+
       - name: Install dependencies
         run: mix deps.get