feat: add auto theme, Redis failover, weekly digest, and campaign map - #1500

buildx failed with: ERROR: failed to build: failed to solve: failed to read dockerfile: open Dockerfile: no such file or directory

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@v4, anchore/sbom-action/download-syft@v0.15.8, docker/build-push-action@v5, docker/login-action@v3, docker/metadata-action@v5, docker/setup-buildx-action@v3. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/