refactor: merge release workflow into ci workflow

The build job now handles both CI verification and release asset uploads,
eliminating duplicated compilation logic between the two workflows.

.github/workflows/ci.yml

@@ -11,9 +11,12 @@ on:
     branches:
       - master
       - main
+  release:
+    types: [created]
 
 jobs:
   lint:
+    if: github.event_name != 'release'
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
@@ -52,3 +55,14 @@ jobs:
         run: |
           source "$GITHUB_WORKSPACE/conf/nginx-configure-flags"
           /tmp/nginx-${NGINX_VERSION}/objs/nginx -V
+
+      - name: Upload release assets
+        if: github.event_name == 'release'
+        env:
+          GH_TOKEN: ${{ github.token }}
+        run: |
+          source "$GITHUB_WORKSPACE/conf/nginx-configure-flags"
+          cp /tmp/nginx-${NGINX_VERSION}/objs/nginx /tmp/nginx-linux-amd64
+          chmod +x /tmp/nginx-linux-amd64
+          gh release upload "${{ github.event.release.tag_name }}" \
+            /tmp/nginx-linux-amd64

.github/workflows/release.yml

@@ -1,43 +0,0 @@
----
-name: "release"
-
-# yamllint disable-line rule:truthy
-on:
-  release:
-    types: [created]
-
-jobs:
-  build-assets:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout code
-        uses: actions/checkout@v6
-
-      - name: Download source tarballs
-        run: |
-          source "$GITHUB_WORKSPACE/conf/nginx-configure-flags"
-          cd /tmp
-          curl -sSL "https://nginx.org/download/nginx-${NGINX_VERSION}.tar.gz" | tar xz
-          curl -sSL "https://github.com/PCRE2Project/pcre2/releases/download/pcre2-${PCRE_VERSION}/pcre2-${PCRE_VERSION}.tar.gz" | tar xz
-          curl -sSL "https://github.com/madler/zlib/archive/v${ZLIB_VERSION}.tar.gz" | tar xz
-
-      - name: Compile nginx
-        run: |
-          source "$GITHUB_WORKSPACE/conf/nginx-configure-flags"
-          cd /tmp/nginx-${NGINX_VERSION}
-          ./configure \
-            --prefix=/tmp/nginx-build \
-            --with-pcre=../pcre2-${PCRE_VERSION} \
-            --with-zlib=../zlib-${ZLIB_VERSION} \
-            "${NGINX_CONFIGURE_FLAGS[@]}"
-          sed -i "/CFLAGS/s/ \-O //g" objs/Makefile
-          make -j"$(nproc)"
-          cp objs/nginx /tmp/nginx-linux-amd64
-          chmod +x /tmp/nginx-linux-amd64
-
-      - name: Upload release assets
-        env:
-          GH_TOKEN: ${{ github.token }}
-        run: |
-          gh release upload "${{ github.event.release.tag_name }}" \
-            /tmp/nginx-linux-amd64