Copilot commented on code in PR #406:
URL: https://github.com/apache/logging-parent/pull/406#discussion_r2133469530


##########
.github/workflows/verify-reproducibility-reusable.yaml:
##########
@@ -61,7 +61,30 @@ jobs:
         with:
           distribution: zulu
           java-version: ${{ inputs.java-version }}
-          cache: maven
+
+      #
+      # Generates a cache key prefix to enable partial cache hits.
+      # If there's no exact match for the full cache key, any cache with this 
prefix can be used as a fallback.
+      # To avoid unbounded cache growth, the prefix includes the current month,
+      # ensuring a new cache is started each month.
+      #
+      - name: Compute Cache Key Prefix
+        shell: bash
+        run: |
+          date +"CACHE_KEY=verify-reproducibility-%Y-%m" >> $GITHUB_ENV
+
+      #
+      # Configures caching for the local Maven repository.
+      # Uses a custom cache key to isolate artifacts built in this workflow,
+      # preventing reproducibility results from being affected by cached 
outputs from other workflows.
+      #
+      - name: Set up Maven Cache
+        uses: actions/cache@5a3ec84eff668545956fd18022155c47e93e2684   # 4.2.3

Review Comment:
   [nitpick] Pinning to a full commit SHA can hinder readability; consider 
using the official version tag (e.g., 'actions/cache@v3') to clarify intent and 
simplify future upgrades.
   ```suggestion
           uses: actions/cache@v3   # 4.2.3
   ```



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