chore: implement zizmor recommendations

Author: fxai

.github/workflows/ci.yml

@@ -6,16 +6,22 @@ on:
     branches: [ "main" ]
 
 
+permissions: {}
+
 jobs:
   backend-checks:
     runs-on: ubuntu-latest
+    permissions:
+      contents: read
 
     defaults:
       run:
         working-directory: ./backend
 
     steps:
     - uses: actions/checkout@v4
+      with:
+        persist-credentials: false
 
     - name: Set up Python 3.14
       uses: actions/setup-python@v5
@@ -39,13 +45,17 @@ jobs:
 
   frontend-checks:
     runs-on: ubuntu-latest
+    permissions:
+      contents: read
 
     defaults:
       run:
         working-directory: ./frontend
 
     steps:
     - uses: actions/checkout@v4
+      with:
+        persist-credentials: false
 
     - name: Set up Bun
       uses: oven-sh/setup-bun@v2
@@ -77,8 +87,12 @@ jobs:
 
   docker-build-check:
     runs-on: ubuntu-latest
+    permissions:
+      contents: read
     steps:
     - uses: actions/checkout@v4
+      with:
+        persist-credentials: false
 
     - name: Set up Docker Buildx
       uses: docker/setup-buildx-action@v3

.github/workflows/docs.yml

@@ -7,10 +7,7 @@ on:
     paths:
       - 'docs/**'
 
-permissions:
-  contents: read
-  pages: write
-  id-token: write
+permissions: {}
 
 concurrency:
   group: "pages"
@@ -22,10 +19,16 @@ jobs:
       name: github-pages
       url: ${{ steps.deployment.outputs.page_url }}
     runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      pages: write
+      id-token: write
     steps:
       - uses: actions/configure-pages@v5
 
       - uses: actions/checkout@v4
+        with:
+          persist-credentials: false
 
       - name: Setup uv
         uses: astral-sh/setup-uv@v5

.github/workflows/release.yml

@@ -22,6 +22,8 @@ jobs:
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
+        with:
+          persist-credentials: false
 
       - name: Log in to the Container registry
         uses: docker/login-action@v3

.github/workflows/sandbox.yml

@@ -6,6 +6,8 @@ on:
     - cron: '0 0 * * *'
   workflow_dispatch:
 
+permissions: {}
+
 jobs:
   redeploy:
     runs-on: ubuntu-latest