Complete private authentication, server integrations and activity reporting

Add Fabric/Forge version builds and Paper integration, preserve permanent player identities across renames, harden session authorization, and surface privacy-conscious launcher/server activity in the panel.

.github/workflows/integrations.yml

@@ -0,0 +1,74 @@
+name: Server integrations
+
+on:
+  push:
+    branches: ['**']
+    paths: ['integrations/**', '.github/workflows/integrations.yml']
+  pull_request:
+    paths: ['integrations/**', '.github/workflows/integrations.yml']
+  workflow_dispatch:
+  workflow_call:
+    inputs:
+      version:
+        type: string
+        default: '0.1.0'
+
+permissions:
+  contents: read
+
+jobs:
+  paper:
+    name: Paper and protocol tests
+    runs-on: ubuntu-24.04
+    steps:
+      - uses: actions/checkout@v5
+      - uses: actions/setup-java@v5
+        with:
+          distribution: temurin
+          java-version: '21'
+      - uses: gradle/actions/setup-gradle@v4
+        with:
+          gradle-version: '8.10.2'
+      - run: gradle -p integrations :common:test :paper:build -PreleaseVersion="${{ inputs.version || '0.1.0' }}"
+      - uses: actions/upload-artifact@v4
+        with:
+          name: server-paper
+          path: integrations/paper/build/libs/scopenet-paper-*.jar
+          if-no-files-found: error
+      - uses: actions/upload-artifact@v4
+        if: failure()
+        with:
+          name: integration-test-reports
+          path: integrations/common/build/reports/tests/
+
+  mods:
+    name: ${{ matrix.loader }} / ${{ matrix.mc.version }}
+    runs-on: ubuntu-24.04
+    strategy:
+      fail-fast: false
+      matrix:
+        loader: [fabric, forge]
+        mc:
+          - { version: '1.20.1', java: '21', gradle: '8.10.2' }
+          - { version: '1.21.1', java: '21', gradle: '8.10.2' }
+          - { version: '26.1.2', java: '25', gradle: '9.6.0' }
+          - { version: '26.2', java: '25', gradle: '9.6.0' }
+          - { version: '26.3', java: '25', gradle: '9.6.0' }
+    steps:
+      - uses: actions/checkout@v5
+      - uses: actions/setup-java@v5
+        with:
+          distribution: temurin
+          java-version: ${{ matrix.mc.java }}
+      - uses: gradle/actions/setup-gradle@v4
+        with:
+          gradle-version: ${{ matrix.mc.gradle }}
+      - run: gradle -p integrations -Ploader=${{ matrix.loader }} -PmcVersion=${{ matrix.mc.version }} -PreleaseVersion="${{ inputs.version || '0.1.0' }}" :${{ matrix.loader }}:build
+      - name: Audit Fabric hooks during server bootstrap (no world startup)
+        if: matrix.loader == 'fabric'
+        run: gradle -p integrations -Ploader=fabric -PmcVersion=${{ matrix.mc.version }} -PreleaseVersion="${{ inputs.version || '0.1.0' }}" -PverifyMixins=true :fabric:runServer
+      - uses: actions/upload-artifact@v4
+        with:
+          name: server-${{ matrix.loader }}-${{ matrix.mc.version }}
+          path: integrations/${{ matrix.loader }}/build/libs/scopenet-${{ matrix.loader }}-${{ matrix.mc.version }}-*.jar
+          if-no-files-found: error

.github/workflows/release.yml

@@ -131,15 +131,26 @@ jobs:
           cache-from: type=gha
           cache-to: type=gha,mode=max
 
+  server-integrations:
+    needs: version
+    uses: ./.github/workflows/integrations.yml
+    with:
+      version: ${{ needs.version.outputs.version }}
+
   release:
     name: GitHub release
-    needs: [version, launcher, panel-image]
+    needs: [version, launcher, panel-image, server-integrations]
     runs-on: ubuntu-24.04
     steps:
       - uses: actions/download-artifact@v4
         with:
           name: windows-installer
           path: dist
+      - uses: actions/download-artifact@v4
+        with:
+          pattern: server-*
+          merge-multiple: true
+          path: dist
       - name: Release notes
         run: |
           IMAGE="ghcr.io/${GITHUB_REPOSITORY_OWNER,,}/scopenet-mc-panel"
@@ -148,6 +159,8 @@ jobs:
 
           **Launcher (Windows):** download the \`-setup.exe\` below and run it. Installed launchers update themselves automatically.
 
+          **Servers:** download \`scopenet-paper\` or the Fabric/Forge JAR for your exact Minecraft version. Keep \`online-mode=true\` and install authlib-injector as documented in \`docs/server-integration.md\`.
+
           **Admin panel (Docker):**
           \`\`\`bash
           docker pull ${IMAGE}:${{ needs.version.outputs.version }}
@@ -162,4 +175,6 @@ jobs:
           body_path: notes.md
           generate_release_notes: true
           prerelease: ${{ contains(needs.version.outputs.version, '-') }}
-          files: dist/*-setup.exe
+          files: |
+            dist/*-setup.exe
+            dist/*.jar