fix(ci): Add symlink for libdl.so on Linux runner

This commit resolves a `System.DllNotFoundException` for `libdl.so` that
was causing all tests to fail on the Linux platform.

The .NET runtime on the GitHub `ubuntu-latest` runner was unable to locate
the dynamic linking library `libdl.so` in its standard search paths, even
though it is present on the system via the `libc6-dev` package.

This fix adds a command to the "Install Linux dependencies" step to create
a symbolic link from the actual library location to a path where the .NET
runtime can find it. This unblocks the native library loader and allows
the tests to run successfully.

Author: s-a

.github/workflows/build-binaries.yml

@@ -52,6 +52,8 @@ jobs:
         run: |
           sudo apt-get update
           sudo apt-get install -y build-essential libc6-dev
+          # FIX: Add symlink for libdl.so to fix DllNotFoundException during tests
+          sudo ln -sf /usr/lib/x86_64-linux-gnu/libdl.so.2 /usr/lib/libdl.so
 
       - name: Run comprehensive build script (Unix)
         if: runner.os != 'Windows'
@@ -64,8 +66,6 @@ jobs:
           echo '📋 Checking generated native libraries:'
           find src/GrepSQL/runtimes/ -name "libpgquery_wrapper.*" -type f
 
-      # HINWEIS: Es wird keine setup-msvc-dev oder setup-msbuild Aktion mehr benötigt,
-      # da das build.ps1-Skript die Umgebung selbst einrichtet.
       - name: Run comprehensive build script (Windows)
         if: runner.os == 'Windows'
         shell: powershell
@@ -76,8 +76,6 @@ jobs:
           echo '📋 Checking generated native libraries:'
           Get-ChildItem -Path "src\GrepSQL\runtimes\win-x64\native" -Filter "*.dll" -Recurse
 
-      # (Rest der YAML-Datei bleibt unverändert)
-      
       - name: Test (non-Windows)
         if: runner.os != 'Windows'
         run: dotnet test --configuration Release --no-build --verbosity normal
@@ -132,6 +130,7 @@ jobs:
     if: github.event_name == 'push' && (contains(github.ref, 'refs/tags/v') || github.ref == 'refs/heads/main')
 
     steps:
+      # (Der Release-Teil bleibt unverändert)
       - name: Checkout code
         uses: actions/checkout@v4
         with: