ci: simplify CUDA + release flags out of the publish pipeline

CUDA cross-compile now always runs and the CUDA classifier is always
included in package, publish-snapshot, and publish-release. Drops the
dead enable_cuda_build flag (it built CUDA but the snapshot deploy
ignored it) and the release_to_maven_central gate (tag pushes never
auto-published anyway since the input is only set via workflow_dispatch).

Tag push now auto-publishes to Maven Central, signed, with CUDA.

https://claude.ai/code/session_01SxxLmcu9vgaPjKnSPeTjEx

Author: claude

.github/workflows/publish.yml

@@ -10,15 +10,6 @@ on:
     tags: ['v*']
   pull_request:
   workflow_dispatch:
-    inputs:
-      release_to_maven_central:
-        description: 'Release to Maven Central (true/false)'
-        required: false
-        default: 'false'
-      enable_cuda_build:
-        description: 'Compile CUDA artifacts (slow — nvcc install + build). Auto-enabled on tag pushes.'
-        required: false
-        default: 'false'
 env:
   JAVA_VERSION: '21'
   MODEL_URL: "https://huggingface.co/TheBloke/CodeLlama-7B-GGUF/resolve/main/codellama-7b.Q2_K.gguf"
@@ -54,8 +45,6 @@ jobs:
     name: Cross-Compile manylinux_2_28 x86_64 (CUDA)
     needs: startgate
     runs-on: ubuntu-latest
-    outputs:
-      built: ${{ steps.build.outputs.built }}
     steps:
       - uses: actions/checkout@v6
       - name: Display CPU Info
@@ -67,18 +56,10 @@ jobs:
           echo "=== CPU Details from /proc/cpuinfo ==="
           cat /proc/cpuinfo
       - name: Build libraries
-        id: build
         shell: bash
         run: |
-          if [[ "${{ startsWith(github.ref, 'refs/tags/v') }}" == "true" || "${{ github.event.inputs.enable_cuda_build }}" == "true" ]]; then
-            .github/dockcross/dockcross-manylinux_2_28-x64 .github/build_cuda_linux.sh "-DOS_NAME=Linux -DOS_ARCH=x86_64"
-            echo "built=true" >> "$GITHUB_OUTPUT"
-          else
-            echo "CUDA compilation skipped — set enable_cuda_build=true or trigger a release event to build CUDA artifacts"
-            echo "built=false" >> "$GITHUB_OUTPUT"
-          fi
+          .github/dockcross/dockcross-manylinux_2_28-x64 .github/build_cuda_linux.sh "-DOS_NAME=Linux -DOS_ARCH=x86_64"
       - name: Upload artifacts
-        if: steps.build.outputs.built == 'true'
         uses: actions/upload-artifact@v7
         with:
           name: linux-libraries-cuda
@@ -616,8 +597,7 @@ jobs:
           pattern: "*-libraries"
           merge-multiple: true
           path: ${{ github.workspace }}/src/main/resources/net/ladenthin/llama/
-      - if: needs.crosscompile-linux-x86_64-cuda.outputs.built == 'true'
-        uses: actions/download-artifact@v8
+      - uses: actions/download-artifact@v8
         with:
           name: linux-libraries-cuda
           path: ${{ github.workspace }}/src/main/resources_linux_cuda/net/ladenthin/llama/
@@ -683,7 +663,7 @@ jobs:
 
   publish-snapshot:
     name: Publish Snapshot to Central
-    needs: [check-snapshot]
+    needs: [check-snapshot, crosscompile-linux-x86_64-cuda]
     if: needs.check-snapshot.result == 'success'
     runs-on: ubuntu-latest
     environment: maven-central
@@ -696,6 +676,10 @@ jobs:
           pattern: "*-libraries"
           merge-multiple: true
           path: ${{ github.workspace }}/src/main/resources/net/ladenthin/llama/
+      - uses: actions/download-artifact@v8
+        with:
+          name: linux-libraries-cuda
+          path: ${{ github.workspace }}/src/main/resources_linux_cuda/net/ladenthin/llama/
       - name: Set up Maven Central Repository
         uses: actions/setup-java@v5
         with:
@@ -707,7 +691,7 @@ jobs:
           gpg-private-key: ${{ secrets.GPG_PRIVATE_KEY }}
           gpg-passphrase: MAVEN_GPG_PASSPHRASE
       - name: Publish snapshot
-        run: mvn --batch-mode -P release -Dmaven.test.skip=true deploy
+        run: mvn --batch-mode -P release,cuda -Dmaven.test.skip=true deploy
         env:
           MAVEN_USERNAME: ${{ secrets.CENTRAL_USERNAME }}
           MAVEN_PASSWORD: ${{ secrets.CENTRAL_TOKEN }}
@@ -750,7 +734,7 @@ jobs:
 
   publish-release:
     name: Publish Release to Central
-    if: needs.check-tag.result == 'success' && github.event.inputs.release_to_maven_central == 'true'
+    if: needs.check-tag.result == 'success'
     needs: [check-tag, crosscompile-linux-x86_64-cuda]
     runs-on: ubuntu-latest
     environment: maven-central
@@ -763,8 +747,7 @@ jobs:
           pattern: "*-libraries"
           merge-multiple: true
           path: ${{ github.workspace }}/src/main/resources/net/ladenthin/llama/
-      - if: needs.crosscompile-linux-x86_64-cuda.outputs.built == 'true'
-        uses: actions/download-artifact@v8
+      - uses: actions/download-artifact@v8
         with:
           name: linux-libraries-cuda
           path: ${{ github.workspace }}/src/main/resources_linux_cuda/net/ladenthin/llama/