ci: resolve sonarcloud findings and cover error cause fields

.github/workflows/build.yml

@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v7
-      - uses: ibiqlik/action-yamllint@v3
+      - uses: ibiqlik/action-yamllint@2576378a8e339169678f9939646ee3ee325e845c
 
   eslint:
     runs-on: ubuntu-latest
@@ -24,11 +24,8 @@ jobs:
       - uses: actions/setup-node@v7
         with:
           node-version: '24'
-      - uses: actions/cache@v6
-        with:
-          path: 'node_modules'
-          key: ${{ runner.os }}-modules-${{ hashFiles('**/package-lock.json') }}
-      - run: npm install
+          cache: npm
+      - run: npm ci --ignore-scripts
       - name: Run ESLint
         run: npm run lint
 
@@ -39,11 +36,8 @@ jobs:
       - uses: actions/setup-node@v7
         with:
           node-version: '24'
-      - uses: actions/cache@v6
-        with:
-          path: 'node_modules'
-          key: ${{ runner.os }}-modules-${{ hashFiles('**/package-lock.json') }}
-      - run: npm install
+          cache: npm
+      - run: npm ci --ignore-scripts
       - name: Run Typescipt Compiler
         run: npm run build
 
@@ -54,11 +48,8 @@ jobs:
       - uses: actions/setup-node@v7
         with:
           node-version: '24'
-      - uses: actions/cache@v6
-        with:
-          path: 'node_modules'
-          key: ${{ runner.os }}-modules-${{ hashFiles('**/package-lock.json') }}
-      - run: npm install
+          cache: npm
+      - run: npm ci --ignore-scripts
       - name: Run depcheck
         run: npm run depcheck
 
@@ -69,15 +60,11 @@ jobs:
       - uses: actions/setup-node@v7
         with:
           node-version: '24'
-      - uses: actions/cache@v6
-        with:
-          path: 'node_modules'
-          key: ${{ runner.os }}-modules-${{ hashFiles('**/package-lock.json') }}
-      - run: npm install
+          cache: npm
+      - run: npm ci --ignore-scripts
       - name: Run tests
         run: npm run test
       - name: SonarCloud Scan
-        uses: sonarsource/sonarcloud-github-action@master
+        uses: SonarSource/sonarqube-scan-action@d209202bc7d53ff1cc128f7f907dac145c9d6ae9
         env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           SONAR_TOKEN: ${{ secrets.SONAR_TOKEN }}

.yamllint.yml

@@ -0,0 +1,8 @@
+---
+extends: default
+
+ignore-from-file: .gitignore
+
+rules:
+  line-length:
+    max: 250

src/index.test.ts

@@ -106,6 +106,22 @@ test("Expand meta err or error", () => {
     expect(spyStderr).toHaveBeenLastCalledWith(expected);
 });
 
+test("Expand meta err with errno, syscall and cause", () => {
+    const logger = create({printTimestamp: false, logLevel: "error"});
+    const err = {
+        message: "connect ECONNREFUSED",
+        name: "Error",
+        errno: -111,
+        syscall: "connect",
+        cause: {code: "ENOTFOUND", hostname: "elastic.example"},
+    };
+
+    logger.error("HulaHop", {err});
+    expect(spyStderr).toHaveBeenCalledTimes(1);
+    const expected = "{\"log.level\":\"error\",\"message\":\"HulaHop\",\"error.message\":\"connect ECONNREFUSED\",\"error.type\":\"Error\",\"error.errno\":\"-111\",\"error.syscall\":\"connect\",\"error.cause.code\":\"ENOTFOUND\",\"error.cause.hostname\":\"elastic.example\"}\n";
+    expect(spyStderr).toHaveBeenLastCalledWith(expected);
+});
+
 test("Expand meta err with fields missing", () => {
     const logger = create({printTimestamp: false, logLevel: "error"});
     const err = {