ci: prevent beta branch builds from triggering production release steps

Skip Windows and Linux code signing, along with artifact downloads for
the beta branch to ensure beta builds don't go through production
release processes.

.github/workflows/publish.yml

@@ -114,7 +114,7 @@ jobs:
       - build-cli
       - version
     runs-on: blacksmith-4vcpu-windows-2025
-    if: github.repository == 'anomalyco/opencode'
+    if: github.repository == 'anomalyco/opencode' && github.ref_name != 'beta'
     env:
       AZURE_CLIENT_ID: ${{ secrets.AZURE_CLIENT_ID }}
       AZURE_TENANT_ID: ${{ secrets.AZURE_TENANT_ID }}
@@ -390,6 +390,7 @@ jobs:
     needs:
       - build-cli
       - version
+    if: github.repository == 'anomalyco/opencode' && github.ref_name != 'beta'
     continue-on-error: false
     env:
       AZURE_CLIENT_ID: ${{ secrets.AZURE_CLIENT_ID }}
@@ -422,7 +423,6 @@ jobs:
             target: aarch64-unknown-linux-gnu
             platform_flag: --linux
     runs-on: ${{ matrix.settings.host }}
-    # if: github.ref_name == 'beta'
     steps:
       - uses: actions/checkout@v3
 
@@ -591,12 +591,13 @@ jobs:
           path: packages/opencode/dist
 
       - uses: actions/download-artifact@v4
+        if: github.ref_name != 'beta'
         with:
           name: opencode-cli-signed-windows
           path: packages/opencode/dist
 
       - uses: actions/download-artifact@v4
-        if: needs.version.outputs.release
+        if: needs.version.outputs.release && github.ref_name != 'beta'
         with:
           pattern: latest-yml-*
           path: /tmp/latest-yml