[devjayy43]

Summary

Minimal changes for three of the open infra/CI issues. Each change is additive and does not alter existing behaviour.

• ci(release): Automated release pipeline with semantic versioning and changelog generation FinesseStudioLab/Trivela#1338 release pipeline: .github/workflows/release.yml runs on semver tag pushes (vX.Y.Z) and creates a GitHub release with notes generated from merged PRs (gh release create --generate-notes). It fails if the tag is not on the remote.
• ci(vercel): Automated preview deployments on Vercel for frontend pull requests FinesseStudioLab/Trivela#1336 Vercel previews: .github/workflows/vercel-preview.yml deploys frontend/ to a Vercel preview for PRs that touch it, then comments the preview URL. It uses the Vercel CLI, needs the VERCEL_TOKEN, VERCEL_ORG_ID and VERCEL_PROJECT_ID secrets, and is skipped for fork PRs.
• infra(helm): Kubernetes Helm charts for automated deployment of backend, indexer, and Redis FinesseStudioLab/Trivela#1335 Helm: adds an optional redis Deployment and Service, controlled by redis.enabled (default false, so existing installs are unchanged). When enabled, the backend gets REDIS_URL=redis://<release>-redis:<port>.

Not included

• Indexer in Helm (infra(helm): Kubernetes Helm charts for automated deployment of backend, indexer, and Redis FinesseStudioLab/Trivela#1335): the event indexer runs inside the backend process, and there is no flag to disable background jobs without also stopping the durable job queue and RPC polling. A separate indexer Deployment needs that flag first, so this PR does not close infra(helm): Kubernetes Helm charts for automated deployment of backend, indexer, and Redis FinesseStudioLab/Trivela#1335.
• Docker image size (infra(docker): Optimize multi-stage Dockerfiles reducing backend image size by 60% FinesseStudioLab/Trivela#1337): backend/Dockerfile is already multi-stage. Measuring a 60% reduction needs a Docker build, so no change is made here.

Verification

• Both workflow files parse as valid YAML.
• Helm templates were reviewed by hand. helm lint and helm template were not run because Helm is not installed in this environment.
• The Vercel and release workflows have not been run in GitHub Actions. The Vercel one needs the three secrets set in the repository.

Closes FinesseStudioLab#1338
Closes FinesseStudioLab#1336
Refs FinesseStudioLab#1335

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