ci: nightly GitHub Action workflow

- Renames the nightly workflow test in '.github/workflows/nightly.yml'
- detects unused dependencies,
- detects Rust version becoming stale w.r.t. stable

Fixes #983

.github/workflows/nightly.yml

@@ -1,101 +1,18 @@
-name: Nightly tests on main
+# Nightly sanity checks
+name: nightly
 
 on:
+  workflow_dispatch: {}
+  # Once per day at 00:00 UTC
   schedule:
-    - cron:  '0 0 * * *'
+    - cron: "0 0 * * *"
 
-jobs:
-  linux_exhaustive:
-    runs-on: buildjet-16vcpu-ubuntu-2204
-    steps:
-      - uses: actions/checkout@v4
-        with:
-          repository: lurk-lab/ci-workflows
-      - uses: ./.github/actions/ci-env
-      - uses: actions/checkout@v4
-        with:
-          submodules: recursive
-      - name: Install dependencies
-        run: sudo apt-get install -y pkg-config libssl-dev
-      - uses: dtolnay/rust-toolchain@stable
-      - uses: taiki-e/install-action@nextest
-      - uses: Swatinem/rust-cache@v2
-      - name: Linux Tests
-        id: tests
-        run: |
-          cargo nextest run --profile ci --workspace --cargo-profile dev-ci --run-ignored all
-        continue-on-error: true
-      - name: Benches build successfully
-        id: benches
-        run: |
-          cargo bench --no-run --profile dev-ci
-        continue-on-error: true
-      - name: Linux Doc Tests
-        id: doctests
-        run: |
-          cargo test --doc --workspace --profile dev-ci
-        continue-on-error: true
-
-      - name: Gather status in a single variable
-        if: steps.tests.outcome == 'success' && steps.benches.outcome == 'success' && steps.doctests.outcome == 'success'
-        run: echo "status=true" >> $GITHUB_ENV
-
-      - name: Debug
-        run: |
-          echo ${{ steps.tests.outcome }}
-          echo ${{ steps.benches.outcome  }}
-          echo ${{ steps.doctests.outcome }}
-          echo ${{ env.status }}
-
-      - name: Amend MESSAGE for tests
-        if: steps.tests.outcome != 'success'
-        run: echo "MESSAGE=${{ env.MESSAGE }} Exhaustive test run failed in https://github.com/lurk-lab/lurk-rs/actions/runs/${{ github.run_id }}" >> $GITHUB_ENV
-
-      - name: Amend MESSAGE for benches
-        if: steps.benches.outcome != 'success'
-        run: echo "MESSAGE=${{ env.MESSAGE }} Bench compilation failed in https://github.com/lurk-lab/lurk-rs/actions/runs/${{ github.run_id }}" >> $GITHUB_ENV
+env:
+  CARGO_TERM_COLOR: always
 
-      - name: Amend MESSAGE for doctests
-        if: steps.doctests.outcome != 'success'
-        run: echo "MESSAGE=${{ env.MESSAGE }} Doc test run failed in https://github.com/lurk-lab/lurk-rs/actions/runs/${{ github.run_id }}" >> $GITHUB_ENV
-
-      - name: Find the last report issue open
-        id: last_issue
-        uses: micalevisk/last-issue-action@v2
-        with:
-          state: open
-          labels: |
-            nightly
-            automated issue
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-
-      - name: Close last report open issue
-        if: env.status == 'true' && steps.last_issue.outputs.has-found == 'true'
-        uses: peter-evans/close-issue@v3
-        with:
-          issue-number: ${{ steps.last_issue.outputs.issue-number }}
-          comment: "All nightly tests succeeded"
-
-      - name: Update last report open issue
-        if: env.status != 'true' && steps.last_issue.outputs.has-found == 'true'
-        uses: peter-evans/create-or-update-comment@v3
-        with:
-          issue-number: ${{ steps.last_issue.outputs.issue-number }}
-          body: ${{ env.MESSAGE }}
-          edit-mode: replace
+jobs:
+  unused-dependencies:
+    uses: lurk-lab/ci-workflows/.github/workflows/unused-deps.yml@main
 
-      - name: Create file for issue
-        if: env.status != 'true' && steps.last_issue.outputs.has-found == 'false'
-        run: echo "${{ env.MESSAGE }}" > ./_body.md
-
-      - name: Create issue from report
-        if: env.status != 'true' && steps.last_issue.outputs.has-found == 'false'
-        uses: peter-evans/create-issue-from-file@v4
-        with:
-          title: Nightly run failed
-          content-filepath: ./_body.md
-          labels: |
-            nightly
-            automated issue
-  
+  rust-version-check:
+    uses: lurk-lab/ci-workflows/.github/workflows/rust-version-check.yml@main