fix: correct codeql workflow permissions, cron, and action ref

- Set root-level permissions to {}
- Add job-level permissions (actions, contents, packages, security-events)
- Pin action ref to commit hash with version comment
- Fix mangled cron schedule
- Clean up workflow structure

.github/workflows/codeql.yml

@@ -1,6 +1,7 @@
 ---
 # yaml-language-server: $schema=https://json.schemastore.org/github-workflow.json
 name: "CodeQL"
+
 on:
   push:
     branches: ["main"]
@@ -10,15 +11,16 @@ on:
     - cron: "22 8 * * 0"
   merge_group:
 
-permissions:
-  actions: read
-  contents: read
+permissions: {}
 
 jobs:
   analyze:
     name: Analyze
     runs-on: ubuntu-latest
     permissions:
+      actions: read
+      contents: read
+      packages: read
       security-events: write
     strategy:
       fail-fast: false
@@ -26,6 +28,6 @@ jobs:
         language: ["actions", "javascript-typescript"]
     steps:
       - name: CodeQL Analysis
-        uses: ivuorinen/actions/codeql-analysis@main
+        uses: ivuorinen/actions/codeql-analysis@97105fc2a909360678588cb50caf0be5144be486 # v2026.03.06
         with:
           language: ${{ matrix.language }}