Split CI/CD into separate CI and Release workflows

- ci.yml: runs tests on PRs, builds+pushes Docker (main/latest) on push
- release.yml: manual workflow_dispatch with version input, protected
  environment, handles full release pipeline (test → version bump →
  Docker → git tag → MCP Registry → GitHub Release)
- Delete old main.yml that combined everything
- Fix server.json version drift (was 0.4.7, now synced to 0.5.1)

Author: IvanBiruk

.github/workflows/ci.yml

@@ -0,0 +1,90 @@
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+env:
+  DOCKER_REGISTRY: ghcr.io
+  IMAGE_NAME: ghcr.io/codealive-ai/codealive-mcp
+
+permissions:
+  contents: read
+  packages: write
+
+jobs:
+  test:
+    name: Test
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-python@v5
+        with:
+          python-version: '3.11'
+          cache: 'pip'
+
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install -e .
+          pip install pytest pytest-asyncio pytest-mock pytest-cov jsonschema
+
+      - name: Run tests
+        run: |
+          python -m pytest src/tests/ -v --cov=src --cov-report=term-missing --cov-report=xml --junitxml=junit/test-results.xml
+
+      - name: Upload test results
+        uses: actions/upload-artifact@v4
+        if: always()
+        with:
+          name: pytest-results
+          path: |
+            junit/test-results.xml
+            coverage.xml
+
+  docker:
+    name: Build & Push Docker
+    needs: test
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: docker/setup-buildx-action@v3
+
+      - name: Login to GitHub Container Registry
+        if: github.event_name == 'push'
+        uses: docker/login-action@v3
+        with:
+          registry: ${{ env.DOCKER_REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      # PR: build only (no push) to validate Dockerfile — single platform for speed
+      - name: Build Docker image (PR validation)
+        if: github.event_name == 'pull_request'
+        uses: docker/build-push-action@v5
+        with:
+          push: false
+          load: true
+          file: ./Dockerfile
+          tags: ${{ env.IMAGE_NAME }}:pr-${{ github.event.number }}
+          cache-from: type=gha
+
+      # Push to main: build multi-platform and push with rolling tags
+      - name: Build and push Docker image
+        if: github.event_name == 'push'
+        uses: docker/build-push-action@v5
+        with:
+          push: true
+          platforms: linux/amd64,linux/arm64
+          file: ./Dockerfile
+          tags: |
+            ${{ env.IMAGE_NAME }}:main
+            ${{ env.IMAGE_NAME }}:latest
+          labels: |
+            io.modelcontextprotocol.server.name=io.github.CodeAlive-AI/codealive-mcp
+          cache-from: type=gha
+          cache-to: type=gha