chore: remove end-of-life v3 execution components (#4194)

v3 (engine V1) is end-of-lifed and the v3 clusters are gone, so this
removes the dead v3 execution code from the monorepo. It's the first
pass of TRI-11824 - the webapp v3 code paths are deliberately left
untouched and gated for a follow-up.

## Apps

Deletes the three v3-only execution apps and their build wiring:

- `apps/coordinator`, `apps/kubernetes-provider`, `apps/docker-provider`
- `.github/workflows/publish-worker.yml` - it built only those three;
the v4 worker publish is a separate workflow
- Their references in `.changeset/config.json`, `.cursorignore`,
`CHANGESETS.md`, `CONTRIBUTING.md`, `.server-changes/README.md`
- `pnpm-lock.yaml` regenerated to prune the apps and their app-only
dependencies (`socket.io`, `@kubernetes/client-node`, `p-queue`,
`execa`, `prom-client`, `tinyexec`)

## Core

Removes the helpers in `@trigger.dev/core` that only those apps used -
`ProviderShell`, `SimpleLogger`, the `Exec`/process helpers,
`isExecaChildProcess`, `getTextBody`, and `testDockerCheckpoint`. Each
was verified to have no remaining consumers anywhere in the repo.

Kept the helpers still used elsewhere: `ExponentialBackoff` (warm-start
client), `HttpReply`/`getJsonBody` (serverOnly http server),
`SimpleStructuredLogger` (widely used), and
`ZodNamespace`/`ZodSocketConnection` (still referenced by legacy v3
webapp code, hence the follow-up pass).

The `./v3/apps` and `./v3/serverOnly` export subpaths remain - only dead
members were trimmed from their barrels, so no `package.json` exports
changed.

## Verification

`@trigger.dev/core` builds, and `typecheck` passes for core, supervisor,
cli-v3, run-engine, redis-worker, and webapp.

refs TRI-11824

.github/workflows/publish-worker.yml

@@ -1,105 +0,0 @@
-name: "⚒️ Publish Worker"
-
-on:
-  workflow_call:
-    inputs:
-      image_tag:
-        description: The image tag to publish
-        type: string
-        required: false
-        default: ""
-      image_registry:
-        description: The registry namespace to publish under (e.g. ghcr.io/<owner>)
-        type: string
-        required: false
-        default: ""
-    secrets:
-      DOCKERHUB_USERNAME:
-        required: false
-      DOCKERHUB_TOKEN:
-        required: false
-  push:
-    tags:
-      - "infra-dev-*"
-      - "infra-test-*"
-      - "infra-prod-*"
-
-permissions:
-  packages: write
-  contents: read
-
-jobs:
-  build:
-    strategy:
-      matrix:
-        package: [coordinator, docker-provider, kubernetes-provider]
-    runs-on: warp-ubuntu-latest-x64-8x
-    env:
-      DOCKER_BUILDKIT: "1"
-      DOCKERHUB_USERNAME: ${{ secrets.DOCKERHUB_USERNAME }}
-    steps:
-      - name: ⬇️ Checkout git repo
-        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
-        with:
-          persist-credentials: false
-
-      - name: 📦 Get image repo
-        id: get_repository
-        env:
-          PACKAGE: ${{ matrix.package }}
-        run: |
-          if [[ "$PACKAGE" == *-provider ]]; then
-            repo="provider/${PACKAGE%-provider}"
-          else
-            repo="$PACKAGE"
-          fi
-          echo "repo=${repo}" >> "$GITHUB_OUTPUT"
-
-      - id: get_tag
-        uses: ./.github/actions/get-image-tag
-        with:
-          tag: ${{ inputs.image_tag }}
-
-      - name: 🐋 Set up Docker Buildx
-        uses: docker/setup-buildx-action@d7f5e7f509e45cec5c76c4d5afdd7de93d0b3df5 # v4.1.0
-
-      # ..to avoid rate limits when pulling images
-      - name: 🐳 Login to DockerHub
-        if: ${{ env.DOCKERHUB_USERNAME }}
-        uses: docker/login-action@650006c6eb7dba73a995cc03b0b2d7f5ca915bee # v4.2.0
-        with:
-          username: ${{ secrets.DOCKERHUB_USERNAME }}
-          password: ${{ secrets.DOCKERHUB_TOKEN }}
-
-      - name: 🚢 Build Container Image
-        run: |
-          docker build -t infra_image -f ./apps/${{ matrix.package }}/Containerfile .
-
-      # ..to push image
-      - name: 🐙 Login to GitHub Container Registry
-        uses: docker/login-action@650006c6eb7dba73a995cc03b0b2d7f5ca915bee # v4.2.0
-        with:
-          registry: ghcr.io
-          username: ${{ github.repository_owner }}
-          password: ${{ secrets.GITHUB_TOKEN }}
-
-      - name: 🐙 Push to GitHub Container Registry
-        run: |
-          docker tag infra_image "$REGISTRY/$REPOSITORY:$IMAGE_TAG"
-          docker push "$REGISTRY/$REPOSITORY:$IMAGE_TAG"
-        env:
-          # Resolved by the caller when invoked from publish.yml; falls back to the
-          # IMAGE_REGISTRY repository variable (or ghcr.io/<owner>) for the direct
-          # push triggers above, so a fork publishes to its own namespace.
-          REGISTRY: ${{ inputs.image_registry || vars.IMAGE_REGISTRY || format('ghcr.io/{0}', github.repository_owner) }}
-          REPOSITORY: ${{ steps.get_repository.outputs.repo }}
-          IMAGE_TAG: ${{ steps.get_tag.outputs.tag }}
-
-      # - name: 🐙 Push 'v3' tag to GitHub Container Registry
-      #   if: steps.get_tag.outputs.is_semver == 'true'
-      #   run: |
-      #     docker tag infra_image "$REGISTRY/$REPOSITORY:v3"
-      #     docker push "$REGISTRY/$REPOSITORY:v3"
-      #   env:
-      #     REGISTRY: ghcr.io/triggerdotdev
-      #     REPOSITORY: ${{ steps.get_repository.outputs.repo }}

.github/workflows/publish.yml

@@ -30,7 +30,6 @@ on:
       - ".github/workflows/unit-tests.yml"
       - ".github/workflows/e2e.yml"
       - ".github/workflows/publish-webapp.yml"
-      - ".github/workflows/publish-worker.yml"
       - "packages/**"
       - "!packages/**/*.md"
       - "!packages/**/*.eslintrc"
@@ -80,19 +79,6 @@ jobs:
       # to its own namespace; set the IMAGE_REGISTRY repository variable to override.
       image_registry: ${{ vars.IMAGE_REGISTRY || format('ghcr.io/{0}', github.repository_owner) }}
 
-  publish-worker:
-    needs: [typecheck]
-    permissions:
-      contents: read
-      packages: write
-    uses: ./.github/workflows/publish-worker.yml
-    secrets:
-      DOCKERHUB_USERNAME: ${{ secrets.DOCKERHUB_USERNAME }}
-      DOCKERHUB_TOKEN: ${{ secrets.DOCKERHUB_TOKEN }}
-    with:
-      image_tag: ${{ inputs.image_tag }}
-      image_registry: ${{ vars.IMAGE_REGISTRY || format('ghcr.io/{0}', github.repository_owner) }}
-
   publish-worker-v4:
     needs: [typecheck]
     permissions: