chore(ci): adopt zizmor and apply fixen (#280)

Author: miketheman

.github/dependabot.yml

@@ -4,7 +4,11 @@ updates:
     directory: "/"
     schedule:
       interval: "daily"
+    cooldown:
+      default-days: 7
   - package-ecosystem: "github-actions"
     directory: "/"
     schedule:
       interval: "weekly"
+    cooldown:
+      default-days: 7

.github/workflows/ci.yml

@@ -4,6 +4,9 @@ on:
     branches:
       - main
   pull_request:
+
+permissions: {}
+
 jobs:
   test:
     strategy:
@@ -18,6 +21,8 @@ jobs:
     steps:
       - name: Check out repository
         uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
       - uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405 # v6.2.0
         with:
           python-version-file: '.python-version'

.github/workflows/zizmor.yml

@@ -0,0 +1,22 @@
+# https://github.com/woodruffw/zizmor
+name: GitHub Actions Security Analysis with Zizmor
+
+on:
+  push:
+    branches: ["main"]
+  pull_request:
+    branches: ["*"]
+
+jobs:
+  zizmor:
+    name: Zizmor
+    runs-on: ubuntu-24.04
+    permissions:
+      security-events: write
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
+      - name: Run zizmor 🌈
+        uses: zizmorcore/zizmor-action@71321a20a9ded102f6e9ce5718a2fcec2c4f70d8 # v0.5.2