[devops] add release workflow, pull_request trigger, and checkout v7 bump

Author: i4004

.github/workflows/build.yml

@@ -1,6 +1,8 @@
 name: Build Package
 
-on: push
+on:
+  push:
+  pull_request:
 
 defaults:
   run:
@@ -15,8 +17,7 @@ jobs:
         os: [ubuntu-latest, windows-latest]
 
     steps:
-      - name: Code Checkout
-        uses: actions/checkout@v6
+      - uses: actions/checkout@v7
 
       - name: Install DotNet
         uses: actions/setup-dotnet@v5
@@ -41,3 +42,27 @@ jobs:
         with:
           name: Packages
           path: ./src/publish/
+
+  release:
+    if: startsWith(github.ref, 'refs/tags/')
+    needs: build
+    permissions:
+      contents: write
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v7
+
+      - name: Extract changelog entry
+        run: |
+          awk '/^## \[/{if(f) exit; f=1; next} f' \
+            Simplify.Web.Swagger/CHANGELOG.md \
+            > /tmp/release_notes.md
+
+      - name: Create release
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          gh release create "${{ github.ref_name }}" \
+            --title "${{ github.ref_name }}" \
+            --notes-file /tmp/release_notes.md

src/Simplify.Web.Swagger/CHANGELOG.md

@@ -2,7 +2,6 @@
 
 ## [2.1.0] - 2026-06-26
 
-
 ### Added
 
 - .NET 10.0 explicit support