fix(ci): Resolve workflow-linter self-matching and metadata issues

Author: hyperpolymath

.github/workflows/boj-build.yml

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: PMPL-1.0-or-later
 name: BoJ Server Build Trigger
 on:
   push:
@@ -8,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4.1.7
       - name: Trigger BoJ Server (Casket/ssg-mcp)
         run: |
           # Send a secure trigger to boj-server to build this repository

.github/workflows/workflow-linter.yml

@@ -63,7 +63,7 @@ jobs:
           echo "=== Checking Action Pinning ==="
           # Find any uses: lines that don't have @SHA format
           # Pattern: uses: owner/repo@<40-char-hex>
-          unpinned=$(grep -rn "uses:" .github/workflows/ | \
+          unpinned=$(grep -rnE "^[[:space:]]+uses:" .github/workflows/ | \
             grep -v "@[a-f0-9]\{40\}" | \
             grep -v "uses: \./\|uses: docker://\|uses: actions/github-script" || true)