CI: Add C4 diagram generation

Author: christosm-dev

.github/workflows/ci.yml

@@ -1,4 +1,4 @@
-name: CI
+name: CI - Tests and Architecture Validation
 
 on:
   push:
@@ -8,27 +8,73 @@ on:
 
 jobs:
   test:
+    name: Run Tests
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v3
+    - name: Checkout code
+      uses: actions/checkout@v4
 
-    - name: Set up Python
-      uses: actions/setup-python@v4
+    - name: Set up Python 3.12
+      uses: actions/setup-python@v5
       with:
-        python-version: '3.11'
+        python-version: '3.12'
 
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
         pip install -r requirements.txt
+        pip install pytest pytest-cov
     
-    - name: Run tests
+    - name: Run tests with coverage
       run: |
-        pytest tests/ -v --tb=short
+        pytest tests/ -v --cov=app --cov-report=term-missing
+
+  validate-architecture:
+    name: Validate C4 Annotations
+    runs-on: ubuntu-latest
+    needs: test
+    
+    steps:
+    - name: Checkout notes-api
+      uses: actions/checkout@v4
+    
+    - name: Set up Python 3.12
+      uses: actions/setup-python@v5
+      with:
+        python-version: '3.12'
+    
+    - name: Install c4-literate-python
+      run: |
+        # For now, install from local path or git repo
+        # Replace with: pip install c4-literate-python
+        # once published to PyPI
+        pip install git+https://github.com/ChristosDev75/c4-literate-python.git@main
+    
+    - name: Validate C4 annotations
+      run: |
+        c4-literate validate .
     
-    - name: Test API startup
+    - name: Generate architecture diagrams
       run: |
-        timeout 10 uvicorn app.main:app --host 0.0.0.0 --port 8000 &
-        sleep 5
-        curl -f http://localhost:8000/ || exit 1
+        mkdir -p docs/architecture
+        c4-literate tangle . -o docs/architecture/workspace.dsl
+    
+    - name: Upload generated DSL
+      uses: actions/upload-artifact@v4
+      with:
+        name: architecture-diagrams
+        path: docs/architecture/workspace.dsl
+        retention-days: 90
+    
+    - name: Comment PR with artifact link
+      if: github.event_name == 'pull_request'
+      uses: actions/github-script@v7
+      with:
+        script: |
+          github.rest.issues.createComment({
+            issue_number: context.issue.number,
+            owner: context.repo.owner,
+            repo: context.repo.repo,
+            body: '✅ Architecture diagrams generated successfully! Download the artifact to view with Structurizr Lite.'
+          })