fix(ci): drop redundant setup-node from bun-only jobs

Once lifecycle scripts are skipped, nothing in create-release, migrate, or
deploy-trigger-dev invokes node: they run bun run scripts/create-single-release.ts,
bun run db:push plus bun run scripts/migrate.ts, and bunx trigger.dev deploy.
All three were green without setup-node for months — the isolated-vm install
script was the only thing that ever needed it, and --ignore-scripts covers that.

setup-node stays where it is load-bearing: publish-cli and publish-ts-sdk need
it for npm publish and its registry-url auth, and test-build/docs-embeddings
already had it.

publish-cli keeps the Node 18 -> 22 bump: that setup-node is required, and 18
has been EOL since April 2025, so it now matches publish-ts-sdk.

Author: waleedlatif1

.github/workflows/ci.yml

@@ -186,13 +186,6 @@ jobs:
         with:
           bun-version: 1.3.13
 
-      # Repo scripts target engines.node >= 22.19.0; without this the job runs on
-      # the runner default (Node 20).
-      - name: Setup Node
-        uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6
-        with:
-          node-version: 22
-
       - name: Cache Bun dependencies
         uses: actions/cache@27d5ce7f107fe9357f9df03efb73ab90386fccae # v5
         with:
@@ -590,13 +583,6 @@ jobs:
         with:
           bun-version: 1.3.13
 
-      # Repo scripts target engines.node >= 22.19.0; without this the job runs on
-      # the runner default (Node 20).
-      - name: Setup Node
-        uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6
-        with:
-          node-version: 22
-
       - name: Install dependencies
         run: bun install --frozen-lockfile --ignore-scripts
 

.github/workflows/migrations.yml

@@ -36,13 +36,6 @@ jobs:
         with:
           bun-version: 1.3.13
 
-      # Repo scripts target engines.node >= 22.19.0; without this the job runs on
-      # the runner default (Node 20).
-      - name: Setup Node
-        uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6
-        with:
-          node-version: 22
-
       - name: Cache Bun dependencies
         uses: actions/cache@27d5ce7f107fe9357f9df03efb73ab90386fccae # v5
         with: