Simplify CI: Move UPX compression and artifact upload to release.yml

- Cleaned up ci.yml for better readability.

.github/workflows/ci.yml

@@ -1,43 +1,31 @@
 name: CI
 
-on: 
+on:
   pull_request:
     types: [synchronize, reopened, closed]
   push:
-    branches: 
+    branches:
       - main
 
 jobs:
   build:
     runs-on: ubuntu-latest
 
     steps:
-    - name: Checkout code
-      uses: actions/checkout@v4
-
-    - name: Set up Go
-      uses: actions/setup-go@v5
-      with:
-        go-version: '1.20'
-
-    - name: Install UPX
-      run: sudo apt-get install -y upx
-
-    - name: Cache Go modules
-      uses: actions/cache@v4
-      with:
-        path: |
-          ~/.cache/go-build
-          ${{ github.workspace }}/go/pkg/mod
-        key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
-        restore-keys: |
-          ${{ runner.os }}-go-
-
-    - name: Build and compress binaries
-      run: make build
-
-    - name: Upload artifacts
-      uses: actions/upload-artifact@v4
-      with:
-        name: build-artifacts
-        path: build/
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Set up Go
+        uses: actions/setup-go@v5
+        with:
+          go-version: "1.20"
+
+      - name: Cache Go modules
+        uses: actions/cache@v4
+        with:
+          path: |
+            ~/.cache/go-build
+            ${{ github.workspace }}/go/pkg/mod
+          key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
+          restore-keys: |
+            ${{ runner.os }}-go-