chore: add 30 minute timeout to Docker build workflow (#4392)

Add a 30-minute timeout to the build job in the reusable Docker build
workflow to prevent indefinite execution of Docker builds.

Co-authored-by: Claude <[email protected]>

Author: shuhuiluo

.github/workflows/_build-docker-arch.yml

@@ -68,6 +68,7 @@ jobs:
     build:
         name: Build ${{ inputs.architecture }} image
         runs-on: ${{ inputs.runner }}
+        timeout-minutes: 30
 
         permissions:
             contents: write