build(ci): Upload sentry-snapshots-runtime zip for craft (EME-1055) (#1169)

Craft's maven target publishes artifacts by downloading the per-commit
zip bundle attached by build.yml and extracting each module's
pom-default.xml. The snapshots runtime was registered in .craft.yml but
never added to the build workflow, so craft never saw its zip and the
artifact was skipped during the 6.5.0 release.

Assemble and upload sentry-snapshots-runtime alongside the other
modules so it gets published on the next release.

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: runningcode

.github/workflows/build.yml

@@ -28,8 +28,8 @@ jobs:
           distribution: 'temurin'
           java-version: '17'
 
-      - name: Build Gradle Plugin and Kotlin Compiler Plugin distribution artifacts
-        run: ./gradlew :plugin-build:assemble :sentry-kotlin-compiler-plugin:assemble
+      - name: Build Gradle Plugin, Kotlin Compiler Plugin, and Snapshots Runtime distribution artifacts
+        run: ./gradlew :plugin-build:assemble :sentry-kotlin-compiler-plugin:assemble :sentry-snapshots-runtime:assemble
 
       - name: Archive artifacts
         uses: actions/upload-artifact@bbbca2ddaa5d8feaa63e36b76fdaad77386f024f # v7
@@ -38,6 +38,7 @@ jobs:
           path: |
             ${{ github.workspace }}/plugin-build/build/distributions/*.zip
             ${{ github.workspace }}/sentry-kotlin-compiler-plugin/build/distributions/*.zip
+            ${{ github.workspace }}/sentry-snapshots-runtime/build/distributions/*.zip
 
       - name: Verify artifact contents
         shell: bash