ci: P1 optimizations — reduce redundant work in CI/CD pipelines

- Remove explicit `npm run build` in publish_npm.yml (prepack already triggers it)
- Add karma-webdriver-launcher to devDependencies, remove ad hoc CI install
- Add workflow concurrency cancellation for verify_pull_request and verify_branch
- Narrow setup-dashjs cache key to root package-lock.json only
- Use npm ci instead of npm install for samples/network-interceptor in deploy

Refs Dash-Industry-Forum#5004

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: PascalThuet

.github/actions/setup-dashjs/action.yml

@@ -14,7 +14,7 @@ runs:
             uses: actions/cache@v4
             with:
                 path: node_modules
-                key: ${{ runner.os }}-build-${{ hashFiles('**/package-lock.json') }}
+                key: ${{ runner.os }}-build-${{ hashFiles('package-lock.json') }}
                 restore-keys: |
                     ${{ runner.os }}-build-
                     ${{ runner.os }}-

.github/workflows/deploy.yml

@@ -46,7 +46,7 @@ jobs:
                     for sample in "network-interceptor"; do
                       echo "Building sample: $sample"
                       cd samples/$sample
-                      npm install
+                      npm ci
                       npm run build
                       rm -rf node_modules
                     done

.github/workflows/publish_npm.yml

@@ -25,8 +25,5 @@ jobs:
             -   name: Install
                 run: npm ci
 
-            -   name: Build
-                run: npm run build
-
             -   name: Publish
                 run: npm publish

.github/workflows/verify_branch.yml

@@ -9,6 +9,10 @@ on:
             - '!v4_main'
             - '!v4_development'
 
+concurrency:
+    group: ${{ github.workflow }}-${{ github.ref }}
+    cancel-in-progress: true
+
 jobs:
     build_and_unit_test:
         runs-on: ubuntu-24.04

.github/workflows/verify_pull_request.yml

@@ -5,6 +5,10 @@ on:
         branches:
             - 'development'
 
+concurrency:
+    group: ${{ github.workflow }}-${{ github.event.pull_request.number }}
+    cancel-in-progress: true
+
 jobs:
     merge_build_and_unit_test:
         runs-on: ubuntu-24.04
@@ -30,8 +34,6 @@ jobs:
                 uses: actions/checkout@v4
             -   name: Setup dash.js
                 uses: ./.github/actions/setup-dashjs
-            -   name: Install karma-webdriver-launcher
-                run: npm install karma-webdriver-launcher
             -   name: Build modern bundle
                 run: npm run webpack-build-modern
             -   name: Start Tunnel