[STG-1232] Speed up PR Github Actions checks, add code coverage, fix e2e bb tests running not running in bb mode

.github/actions/publish-ctrf-report/action.yml

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+name: Publish CTRF report
+description: Convert JUnit to CTRF (optional) and publish CTRF report with Insights.
+inputs:
+  junit-path:
+    description: Path to the JUnit XML report.
+    required: false
+    default: ""
+  tool:
+    description: Tool name for the CTRF report (e.g. playwright, vitest, node-test).
+    required: false
+    default: "junit"
+  github-token:
+    description: GitHub token for publishing CTRF reports.
+    required: true
+
+outputs:
+  artifact-name:
+    description: Name of the CTRF artifact uploaded by the reporter.
+    value: ${{ steps.ctrf-meta.outputs.ARTIFACT_NAME }}
+  report-path:
+    description: CTRF report path or glob.
+    value: ${{ steps.ctrf-meta.outputs.REPORT_PATH }}
+
+runs:
+  using: composite
+  steps:
+    - name: Set CTRF metadata
+      id: ctrf-meta
+      shell: bash
+      run: |
+        junit_path="${{ inputs.junit-path }}"
+        if [ -n "$junit_path" ]; then
+          rel_path="${junit_path##*/ctrf/}"
+          rel_path="${rel_path%.xml}"
+          safe_name="${rel_path//\//-}"
+          echo "ARTIFACT_NAME=ctrf-${safe_name}" >> "$GITHUB_OUTPUT"
+          echo "REPORT_PATH=ctrf/${safe_name}.json" >> "$GITHUB_OUTPUT"
+        else
+          job_name="${GITHUB_JOB:-ctrf-report}"
+          safe_job_name="${job_name//\//-}"
+          echo "ARTIFACT_NAME=ctrf-${safe_job_name}" >> "$GITHUB_OUTPUT"
+          echo "REPORT_PATH=./ctrf/*.json" >> "$GITHUB_OUTPUT"
+        fi
+
+    - name: Convert JUnit to CTRF
+      if: ${{ inputs.junit-path != '' }}
+      shell: bash
+      run: |
+        junit_path="${{ inputs.junit-path }}"
+        if [ -f "$junit_path" ]; then
+          if [ ! -s "$junit_path" ]; then
+            echo "JUnit report is empty at $junit_path"
+            exit 0
+          fi
+          if ! pnpm dlx junit-to-ctrf "$junit_path" \
+            -o "${{ steps.ctrf-meta.outputs.REPORT_PATH }}" \
+            -t "${{ inputs.tool }}"; then
+            echo "JUnit-to-CTRF conversion failed; leaving no CTRF report."
+            exit 0
+          fi
+        else
+          echo "JUnit report not found at $junit_path"
+          exit 0
+        fi
+
+    - name: Check CTRF report
+      id: ctrf-report
+      shell: bash
+      run: |
+        report_path="${{ steps.ctrf-meta.outputs.REPORT_PATH }}"
+        if [ -f "$report_path" ]; then
+          echo "found=true" >> "$GITHUB_OUTPUT"
+        else
+          echo "found=false" >> "$GITHUB_OUTPUT"
+        fi
+
+    - name: Upload CTRF report artifact
+      if: ${{ steps.ctrf-report.outputs.found == 'true' }}
+      uses: actions/upload-artifact@v4
+      with:
+        name: ${{ steps.ctrf-meta.outputs.ARTIFACT_NAME }}
+        path: ${{ steps.ctrf-meta.outputs.REPORT_PATH }}

.github/actions/select-browserbase-region/action.yml

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+name: Select Browserbase region
+description: Select a Browserbase region based on a weighted distribution.
+inputs:
+  distribution:
+    description: Comma-separated region=weight list (e.g. us-west-2=40,us-east-1=20).
+    required: true
+outputs:
+  region:
+    description: Selected region.
+    value: ${{ steps.select.outputs.region }}
+runs:
+  using: composite
+  steps:
+    - id: select
+      shell: bash
+      run: |
+        dist="${{ inputs.distribution }}"
+        if [ -z "$dist" ]; then
+          echo "BROWSERBASE_REGION_DISTRIBUTION is empty"
+          exit 1
+        fi
+        IFS=',' read -r -a entries <<< "$dist"
+        total=0
+        regions=()
+        weights=()
+        for entry in "${entries[@]}"; do
+          region="${entry%%=*}"
+          weight="${entry#*=}"
+          if [ -z "$region" ] || [ -z "$weight" ]; then
+            echo "Invalid region distribution entry: $entry"
+            exit 1
+          fi
+          if ! [[ "$weight" =~ ^[0-9]+$ ]]; then
+            echo "Invalid weight for region $region: $weight"
+            exit 1
+          fi
+          regions+=("$region")
+          weights+=("$weight")
+          total=$((total + weight))
+        done
+        if [ "$total" -le 0 ]; then
+          echo "Invalid total weight: $total"
+          exit 1
+        fi
+        roll=$((RANDOM % total))
+        cumulative=0
+        chosen=""
+        for i in "${!regions[@]}"; do
+          cumulative=$((cumulative + weights[i]))
+          if [ "$roll" -lt "$cumulative" ]; then
+            chosen="${regions[i]}"
+            break
+          fi
+        done
+        if [ -z "$chosen" ]; then
+          echo "Failed to choose Browserbase region"
+          exit 1
+        fi
+        echo "Selected Browserbase region: $chosen"
+        echo "region=$chosen" >> "$GITHUB_OUTPUT"
+        echo "BROWSERBASE_REGION=$chosen" >> "$GITHUB_ENV"

.github/actions/setup-node-pnpm-turbo/action.yml

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+name: Setup Node, pnpm, and Turbo cache
+description: Configure pnpm and Node.js with caching, restore Turbo cache, and install dependencies.
+inputs:
+  node-version:
+    description: Node.js version to use.
+    required: false
+    default: "20.x"
+  use-prebuilt-artifacts:
+    description: Whether to download pre-built package from build artifacts.
+    required: false
+    default: "true"
+
+runs:
+  using: composite
+  steps:
+    - uses: pnpm/action-setup@v4
+
+    - name: Set up Node.js
+      uses: actions/setup-node@v6
+      with:
+        node-version: ${{ inputs.node-version }}
+        cache: 'pnpm'
+        cache-dependency-path: '**/pnpm-lock.yaml'
+
+    - name: Restore Turbo cache
+      uses: actions/cache/restore@v4
+      with:
+        path: .turbo
+        key: ${{ runner.os }}-turbo-${{ hashFiles('turbo.json', '**/pnpm-lock.yaml') }}
+        restore-keys: |
+          ${{ runner.os }}-turbo-
+
+    - name: Install dependencies
+      shell: bash
+      run: pnpm install --frozen-lockfile --prefer-offline
+
+    - name: Download build artifacts
+      if: ${{ inputs.use-prebuilt-artifacts == 'true' }}
+      uses: actions/download-artifact@v4
+      with:
+        name: build-artifacts
+        path: .
+        merge-multiple: true
+
+    - name: Prepare test output directories
+      shell: bash
+      run: |
+        mkdir -p "${GITHUB_WORKSPACE}/ctrf"
+        if [ -n "${NODE_V8_COVERAGE:-}" ]; then
+          mkdir -p "$NODE_V8_COVERAGE"
+        fi

.github/actions/upload-v8-coverage/action.yml

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+name: Upload V8 coverage
+description: Upload V8 coverage artifacts.
+inputs:
+  name:
+    description: Artifact name.
+    required: true
+
+runs:
+  using: composite
+  steps:
+    - name: Normalize artifact name
+      id: normalize
+      shell: bash
+      run: |
+        name="${{ inputs.name }}"
+        echo "name=${name//\//-}" >> "$GITHUB_OUTPUT"
+
+    - name: Upload coverage artifact
+      uses: actions/upload-artifact@v4
+      with:
+        name: ${{ steps.normalize.outputs.name }}
+        path: ${{ env.NODE_V8_COVERAGE }}