(refactor) restructure workflow into two jobs with dependency

Split the workflow into separate check_version and build jobs using the needs keyword for job dependencies. This improves separation of concerns and makes the workflow structure more explicit.

Key changes:
- Created check_version job that outputs version_changed and version
- Build job now depends on check_version using needs keyword
- Build job uses version from check_version output (no re-reading)
- Added fetch-depth: 0 to ensure full git history for comparison
- Removed duplicate version reading step from build job
- Build conditional now uses needs.check_version.outputs.version_changed

Benefits:
- Clear separation between version checking and build logic
- Version is determined once and reused across jobs
- Better observability with separate job statuses in UI
- Enables potential reuse of version outputs by other jobs

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

.gitea/workflows/build.yml

@@ -11,13 +11,17 @@ on:
       - main
 
 jobs:
-  build:
-    if: github.event_name == 'pull_request' || steps.version-check.outputs.version_changed == 'true'
+  check_version:
     runs-on: ubuntu-latest
+    outputs:
+      version_changed: ${{ steps.version-check.outputs.version_changed }}
+      version: ${{ steps.version-check.outputs.version }}
 
     steps:
       - name: Checkout code
         uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
 
       - name: Check if version changed
         id: version-check
@@ -25,6 +29,7 @@ jobs:
           # Get current version
           CURRENT_VERSION=$(node -p "require('./package.json').version")
           echo "Current version: $CURRENT_VERSION"
+          echo "version=$CURRENT_VERSION" >> $GITHUB_OUTPUT
 
           # Check if HEAD~1 exists (handle first commit)
           if ! git rev-parse HEAD~1 &>/dev/null; then
@@ -53,12 +58,14 @@ jobs:
             echo "version_changed=false" >> $GITHUB_OUTPUT
           fi
 
-      - name: Read package.json version
-        id: package-version
-        run: |
-          VERSION=$(node -p "require('./package.json').version")
-          echo "version=$VERSION" >> $GITHUB_OUTPUT
-          echo "Building version: $VERSION"
+  build:
+    needs: check_version
+    if: needs.check_version.outputs.version_changed == 'true' || github.event_name == 'pull_request'
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
 
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
@@ -80,7 +87,7 @@ jobs:
           context: .
           push: true
           tags: |
-            registry.budakova.org/knee-cola/gitea-actions-demo-project:${{ steps.package-version.outputs.version }}
+            registry.budakova.org/knee-cola/gitea-actions-demo-project:${{ needs.check_version.outputs.version }}
             registry.budakova.org/knee-cola/gitea-actions-demo-project:latest
           cache-from: type=registry,ref=registry.budakova.org/knee-cola/gitea-actions-demo-project:buildcache
           cache-to: type=registry,ref=registry.budakova.org/knee-cola/gitea-actions-demo-project:buildcache,mode=max