ci: harden workflow permissions

.github/dependabot.yml

@@ -0,0 +1,13 @@
+version: 2
+updates:
+  - package-ecosystem: cargo
+    directory: /
+    schedule:
+      interval: weekly
+    open-pull-requests-limit: 5
+
+  - package-ecosystem: github-actions
+    directory: /
+    schedule:
+      interval: weekly
+    open-pull-requests-limit: 5

.github/workflows/build-artifacts-manual.yml

@@ -57,6 +57,8 @@ jobs:
 
     steps:
       - uses: actions/checkout@v4
+        with:
+          persist-credentials: false
 
       - name: Install Rust
         uses: dtolnay/rust-toolchain@stable
@@ -135,6 +137,8 @@ jobs:
 
     steps:
       - uses: actions/checkout@v4
+        with:
+          persist-credentials: false
 
       - name: Install Rust
         uses: dtolnay/rust-toolchain@stable

.github/workflows/ci.yml

@@ -8,6 +8,9 @@ on:
     paths-ignore:
       - "website/**"
 
+permissions:
+  contents: read
+
 concurrency:
   group: ci-${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
   cancel-in-progress: true
@@ -23,6 +26,8 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v4
+        with:
+          persist-credentials: false
 
       - name: Install just
         uses: extractions/setup-just@v3

.github/workflows/label-next-release-issues.yml

@@ -19,6 +19,7 @@ jobs:
       - uses: actions/checkout@v4
         with:
           fetch-depth: 0
+          persist-credentials: false
 
       - name: Close issues referenced by pushed commits
         shell: bash

.github/workflows/release.yml

@@ -6,13 +6,15 @@ on:
       - "v*"
 
 permissions:
-  contents: write
+  contents: read
 
 env:
   FORCE_JAVASCRIPT_ACTIONS_TO_NODE24: true
 
 jobs:
   build:
+    permissions:
+      contents: read
     strategy:
       matrix:
         include:
@@ -44,6 +46,8 @@ jobs:
 
     steps:
       - uses: actions/checkout@v4
+        with:
+          persist-credentials: false
 
       - name: Verify tag matches Cargo.toml version
         run: |
@@ -108,9 +112,13 @@ jobs:
   release:
     needs: build
     runs-on: ubuntu-latest
+    permissions:
+      contents: write
 
     steps:
       - uses: actions/checkout@v4
+        with:
+          persist-credentials: false
 
       - name: Download all artifacts
         uses: actions/download-artifact@v4
@@ -140,6 +148,7 @@ jobs:
       - uses: actions/checkout@v4
         with:
           fetch-depth: 0
+          persist-credentials: false
 
       - name: Close issues referenced by released commits
         shell: bash
@@ -257,6 +266,8 @@ jobs:
   update-latest-json:
     needs: release
     runs-on: ubuntu-latest
+    permissions:
+      contents: write
 
     steps:
       - uses: actions/checkout@v4