Declare workflow permissions explicitly

.github/workflows/build-verification.yml

@@ -1,5 +1,8 @@
 name: Verify Build
 
+permissions:
+  contents: read
+
 on:
   pull_request:
     branches: [ main ]

.github/workflows/cross-platform-testing-build-from-source.yml

@@ -1,5 +1,8 @@
 name: Run Cross-Platform Tests (Build From Source)
 
+permissions:
+  contents: read
+
 on:
   push:
     branches:

.github/workflows/cross-platform-testing-use-development-release.yml

@@ -1,5 +1,8 @@
 name: Run Cross-Platform Tests (Use Development Release)
 
+permissions:
+  contents: read
+
 on:
   workflow_run:
     workflows: [Create Development Release]

.github/workflows/development-release.yml

@@ -1,5 +1,8 @@
 name: Create Development Release
 
+permissions:
+  contents: read
+
 on:
   workflow_dispatch:
     inputs:

.github/workflows/production-release.yml

@@ -1,5 +1,8 @@
 name: Create Production Release
 
+permissions:
+  contents: read
+
 on:
   workflow_dispatch:
     inputs: