build: cache dependencies in coverage workflow

---
type: pre_commit_static_analysis_report
description: Results of running static analysis checks when committing changes.
report:
  - task: lint_filenames
    status: passed
  - task: lint_editorconfig
    status: passed
  - task: lint_markdown
    status: na
  - task: lint_package_json
    status: na
  - task: lint_repl_help
    status: na
  - task: lint_javascript_src
    status: na
  - task: lint_javascript_cli
    status: na
  - task: lint_javascript_examples
    status: na
  - task: lint_javascript_tests
    status: na
  - task: lint_javascript_benchmarks
    status: na
  - task: lint_python
    status: na
  - task: lint_r
    status: na
  - task: lint_c_src
    status: na
  - task: lint_c_examples
    status: na
  - task: lint_c_benchmarks
    status: na
  - task: lint_c_tests_fixtures
    status: na
  - task: lint_shell
    status: na
  - task: lint_typescript_declarations
    status: na
  - task: lint_typescript_tests
    status: na
  - task: lint_license_headers
    status: passed
---

Author: Planeshifter

.github/workflows/run_tests_coverage.yml

@@ -120,8 +120,21 @@ jobs:
           node-version: 20 # 'lts/*'
         timeout-minutes: 5
 
+      # Cache dependencies:
+      - name: 'Cache dependencies'
+        # Pin action to full length commit SHA
+        uses: actions/cache@1bd1e32a3bdc45362d1e726936510720a7c30a57 # v4.2.0
+        id: cache
+        with:
+          path: |
+            ${{ github.workspace }}/node_modules
+          key: ${{ runner.os }}-node-${{ hashFiles('**/package.json') }}
+          restore-keys: |
+            ${{ runner.os }}-node-
+
       # Install dependencies (accounting for possible network failures, etc, when installing node module dependencies):
       - name: 'Install dependencies'
+        if: steps.cache.outputs.cache-hit != 'true'
         run: |
           make install-node-modules || make install-node-modules || make install-node-modules
         timeout-minutes: 15