Simplify workflow structure: build.yml calls release.yml

- Make build.yml the main workflow with original triggers
- Add release job to build.yml that calls release.yml when needed
- Remove unnecessary main.yml workflow
- Both build and release now run in same workflow instance
- Cleaner, simpler structure

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

Author: pditommaso

.github/workflows/build.yml

@@ -1,7 +1,12 @@
 name: Gradle Build
 
 on:
-  workflow_call:
+  push:
+    branches:
+      - 'master'
+  pull_request:
+    types: [opened, reopened, synchronize]
+  workflow_dispatch:
 
 jobs:
   build:
@@ -19,3 +24,11 @@ jobs:
 
       - name: Run Gradle Build
         run: ./gradlew build --no-daemon
+
+  release:
+    needs: build
+    if: github.ref == 'refs/heads/master' && contains(github.event.head_commit.message, '[release]')
+    uses: ./.github/workflows/release.yml
+    with:
+      should_release: true
+    secrets: inherit