elk stack + readme + agent refactorings

Author: niesfisch

.github/workflows/codeql.yml

@@ -0,0 +1,72 @@
+name: Maven Tests
+
+on:
+  push:
+    branches:
+      - main
+      - master
+  pull_request:
+    branches:
+      - main
+      - master
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+jobs:
+  test:
+    name: Test (JDK ${{ matrix.java }})
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        java:
+          - '8'
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up JDK
+        uses: actions/setup-java@v4
+        with:
+          distribution: temurin
+          java-version: ${{ matrix.java }}
+          cache: maven
+
+      - name: Run tests
+        run: mvn -B -ntp test
+
+      - name: Upload surefire reports
+        if: always()
+        uses: actions/upload-artifact@v4
+        with:
+          name: surefire-reports-jdk-${{ matrix.java }}
+          path: target/surefire-reports
+          if-no-files-found: warn
+
+  package:
+    name: Package (JDK ${{ matrix.java }})
+    runs-on: ubuntu-latest
+    needs: test
+    strategy:
+      fail-fast: false
+      matrix:
+        java:
+          - '8'
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up JDK
+        uses: actions/setup-java@v4
+        with:
+          distribution: temurin
+          java-version: ${{ matrix.java }}
+          cache: maven
+
+      - name: Build package
+        run: mvn -B -ntp package -DskipTests
+

.github/workflows/maven-tests.yml

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2018 Marcel Sauer <niesfisch79@gmail.com>
+Copyright (c) 2026 Marcel Sauer <niesfisch79@gmail.com>
 
 Permission is hereby granted, free of charge, to any person obtaining
 a copy of this software and associated documentation files (the