* ci: optimize workflows to cut redundant runs and add timeout protection
Skip validation jobs (build, test, lint, Docker, E2E) on push-to-main
since code was already validated on the PR. Skip CI entirely for
release-please PRs (version bump only). Add timeout-minutes to all jobs
to prevent hung runners from burning 360 min (GitHub default). Add npm
caching to the start-app composite action. Add concurrency control to
docker-publish. Group Dependabot updates to batch PRs per ecosystem.
Estimated savings: ~10 min per release cycle, ~30-40 min/day.
* chore: add tsbuildinfo to gitignore
Adds the ability to schedule recurring Docker operations (stack restarts,
fleet snapshots, system prunes) via cron expressions with full execution
history logging. Includes Run Now for on-demand execution.
Anso