Optimise validation action

Author: yaswant

.github/workflows/validate.yaml

@@ -15,9 +15,13 @@ permissions: read-all
 jobs:
 
   validate:
-    name: QC
+    name: ${{ matrix.check }}
     runs-on: ubuntu-24.04
     timeout-minutes: 5
+    strategy:
+      fail-fast: false
+      matrix:
+        check: [yaml-lint, python-lint, python-format, shell-check]
 
     env:
       UV_CACHE_DIR: /tmp/.uv-cache
@@ -31,31 +35,25 @@ jobs:
         with:
           python-version: ${{ env.UV_PYTHON }}
           enable-cache: true
-
-      - name: Restore uv cache
-        uses: actions/cache@v4
-        with:
-          path: ${{ env.UV_CACHE_DIR }}
-          key: uv-${{ runner.os }}-${{ hashFiles('uv.lock') }}
-          restore-keys: |
-            uv-${{ runner.os }}-${{ hashFiles('uv.lock') }}
-            uv-${{ runner.os }}
+          cache-dependency-glob: "uv.lock"
 
       - name: Install dependencies
-        run: uv sync
+        run: uv sync --frozen
 
       - name: YAML Lint
+        if: matrix.check == 'yaml-lint'
         run: uv run yamllint -s .
 
       - name: Python Lint
-        if: always()
+        if: matrix.check == 'python-lint'
         run: uv run ruff check --respect-gitignore .
+
       - name: Python Format Check
-        if: always()
+        if: matrix.check == 'python-format'
         run: uv run ruff format --check --diff -s --respect-gitignore .
 
       - name: Shell Check
-        if: always()
+        if: matrix.check == 'shell-check'
         shell: bash
         run: |
           mapfile -d '' potential_files < <(
@@ -71,6 +69,3 @@ jobs:
             | xargs -r uv run shellcheck -S warning \
             && echo "All checks passed!"
         continue-on-error: true
-
-      - name: Minimize uv cache
-        run: uv cache prune --ci