devops: rework CI and CD to use source change detection

.github/workflows/main.yaml

@@ -1,47 +1,61 @@
-name: Main
+name: Main Workflow
 
 on:
   push:
     branches:
       - '**'  # Matches all branches
+  pull_request:
 
 jobs:
   ci:
     name: CI
     runs-on: ubuntu-latest
+    outputs:
+      src_changed: ${{ steps.src_changed.outputs.changes }}
     steps:
 
       - name: checkout
         uses: actions/checkout@v4
         with:
-          fetch-depth: 1
+          fetch-depth: 0
+
+      - name: src - identify source changes
+        id: src_changed
+        uses: dorny/paths-filter@v3
+        with:
+          base: ${{ github.ref }}
+          filters: |
+            src:
+              - 'src/**'
+            solution:
+              - 'ES.FX.sln'
+            build:
+              - 'Directory.Build.props'
 
       - name: build 
         uses: ./.github/actions/build
+        if: steps.src_changed.outputs.src == 'true'
         with:
           configuration: Debug
           useVersioning: false
 
       - name: test 
+        if: steps.src_changed.outputs.src == 'true'
         uses: ./.github/actions/test
 
   cd:
     name: CD
-    needs: ci
     runs-on: ubuntu-latest
+    needs: ci
     if: >
-      (
-      contains(toJson(github.event.commits), 'src/') || 
-      contains(toJson(github.event.commits), 'ES.FX.sln') || 
-      contains(toJson(github.event.commits), 'Directory.Build.props')
-      ) && (
-      github.ref == 'refs/heads/main' ||
+      needs.ci.outputs.src_changed == 'true' &&
+      github.event.workflow_run.conclusion == 'success' && 
+      github.event.workflow_run.event == 'push' &&
+      (github.ref == 'refs/heads/main' ||
       github.ref == 'refs/heads/develop' ||
       startsWith(github.ref, 'refs/heads/feature/') ||
       startsWith(github.ref, 'refs/heads/release/') ||
-      startsWith(github.ref, 'refs/heads/hotfix/')
-      )
-
+      startsWith(github.ref, 'refs/heads/hotfix/'))
     steps:
       - name: checkout
         uses: actions/checkout@v4
@@ -79,12 +93,9 @@ jobs:
       - name: dotnet nuget add source
         shell: bash
         run: dotnet nuget add source --username USERNAME --password ${{ secrets.GITHUB_TOKEN }} --store-password-in-clear-text --name github "https://nuget.pkg.github.com/emberstack/index.json"
-
-
+
       - name: dotnet nuget push
         run: |
           for pkg in .artifacts/nuget/*.nupkg; do
             dotnet nuget push "$pkg" --source "github" --api-key ${{ secrets.ES_GITHUB_PAT }} 
           done
-          
-