feat: add marketplace metrics, privacy features, and service registry endpoints

- Add Prometheus metrics for marketplace API throughput and error rates with new dashboard panels
- Implement confidential transaction models with encryption support and access control
- Add key management system with registration, rotation, and audit logging
- Create services and registry routers for service discovery and management
- Integrate ZK proof generation for privacy-preserving receipts
- Add metrics instru

docs/.github/workflows/deploy-docs.yml

@@ -0,0 +1,115 @@
+name: Deploy Documentation
+
+on:
+  push:
+    branches: [ main, develop ]
+    paths: [ 'docs/**' ]
+  pull_request:
+    branches: [ main ]
+    paths: [ 'docs/**' ]
+  workflow_dispatch:
+
+permissions:
+  contents: read
+  pages: write
+  id-token: write
+
+concurrency:
+  group: "pages"
+  cancel-in-progress: false
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Setup Python
+        uses: actions/setup-python@v4
+        with:
+          python-version: '3.11'
+
+      - name: Install dependencies
+        run: |
+          pip install -r docs/requirements.txt
+
+      - name: Generate OpenAPI specs
+        run: |
+          cd docs
+          python scripts/generate_openapi.py
+
+      - name: Build documentation
+        run: |
+          cd docs
+          mkdocs build --strict
+
+      - name: Upload artifact
+        uses: actions/upload-pages-artifact@v2
+        with:
+          path: docs/site
+
+  deploy:
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    runs-on: ubuntu-latest
+    needs: build
+    if: github.ref == 'refs/heads/main'
+    steps:
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v2
+
+  # Deploy to staging for develop branch
+  deploy-staging:
+    runs-on: ubuntu-latest
+    needs: build
+    if: github.ref == 'refs/heads/develop'
+    steps:
+      - name: Deploy to Staging
+        uses: peaceiris/actions-gh-pages@v3
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          publish_dir: ./docs/site
+          destination_dir: staging
+          user_name: github-actions[bot]
+          user_email: github-actions[bot]@users.noreply.github.com
+
+  # Deploy to production S3
+  deploy-production:
+    runs-on: ubuntu-latest
+    needs: build
+    if: github.ref == 'refs/heads/main'
+    environment: production
+    steps:
+      - name: Configure AWS Credentials
+        uses: aws-actions/configure-aws-credentials@v2
+        with:
+          aws-access-key-id: ${{ secrets.AWS_ACCESS_KEY_ID }}
+          aws-secret-access-key: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
+          aws-region: us-east-1
+
+      - name: Deploy to S3
+        run: |
+          aws s3 sync docs/site/ s3://docs.aitbc.io/ --delete
+          aws cloudfront create-invalidation --distribution-id ${{ secrets.CLOUDFRONT_DISTRIBUTION_ID }} --paths "/*"
+
+  # Notify on deployment
+  notify:
+    runs-on: ubuntu-latest
+    needs: [deploy, deploy-production]
+    if: always()
+    steps:
+      - name: Notify Discord
+        uses: rjstone/discord-webhook-notify@v1
+        with:
+          severity: info
+          text: "Documentation deployment completed"
+          description: |
+            Build: ${{ needs.build.result }}
+            Deploy: ${{ needs.deploy.result }}
+            Production: ${{ needs.deploy-production.result }}
+          webhookUrl: ${{ secrets.DISCORD_WEBHOOK }}