Harden existing workflows to pass zizmor (pedantic)

Pin actions to commit SHAs (latest releases), add concurrency limits, and set persist-credentials: false on read-only checkouts.

Author: Seldaek

.github/workflows/continuous-integration.yml

@@ -4,6 +4,10 @@ on:
   - push
   - pull_request
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 permissions:
   contents: read
 
@@ -34,14 +38,16 @@ jobs:
             experimental: false
 
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
 
-      - uses: shivammathur/setup-php@v2
+      - uses: shivammathur/setup-php@7c071dfe9dc99bdf297fa79cb49ea005b9fcadbc # 2.37.1
         with:
           php-version: "${{ matrix.php-version }}"
           coverage: none
 
-      - uses: ramsey/composer-install@v4
+      - uses: ramsey/composer-install@65e4f84970763564f46a70b8a54b90d033b3bdda # 4.0.0
         with:
           dependency-versions: highest
 

.github/workflows/lint.yml

@@ -4,6 +4,10 @@ on:
   - push
   - pull_request
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 permissions:
   contents: read
 
@@ -20,9 +24,11 @@ jobs:
           - "nightly"
 
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
 
-      - uses: shivammathur/setup-php@v2
+      - uses: shivammathur/setup-php@7c071dfe9dc99bdf297fa79cb49ea005b9fcadbc # 2.37.1
         with:
           php-version: "${{ matrix.php-version }}"
           coverage: none

.github/workflows/phpstan.yml

@@ -4,6 +4,10 @@ on:
   - push
   - pull_request
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 permissions:
   contents: read
 
@@ -20,14 +24,16 @@ jobs:
           - "8.3"
 
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
 
-      - uses: shivammathur/setup-php@v2
+      - uses: shivammathur/setup-php@7c071dfe9dc99bdf297fa79cb49ea005b9fcadbc # 2.37.1
         with:
           php-version: "${{ matrix.php-version }}"
           coverage: none
 
-      - uses: ramsey/composer-install@v4
+      - uses: ramsey/composer-install@65e4f84970763564f46a70b8a54b90d033b3bdda # 4.0.0
         with:
           dependency-versions: highest