Wire frontend to real API endpoints

Dashboard page:
- Fetch top clients from /api/dashboard/by-client
- Show loading state while fetching
- Display empty state when no client data
- Show real client_id, job count, and success rate

Scrapers page:
- Fetch versions from /api/admin/scrapers
- Wire promote/deprecate buttons to real API calls
- Wire add version form to POST /api/admin/scrapers
- Wire traffic allocation to PUT /api/admin/scrapers/{id}/traffic
- Add loading and error states

Dockerfile:
- Add COPY commands for new directories (api/, core/, scrapers/, etc.)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Dockerfile

@@ -55,6 +55,12 @@ RUN pip install --no-cache-dir -r requirements-production.txt
 
 # Copy application code
 COPY modules/ ./modules/
+COPY api/ ./api/
+COPY core/ ./core/
+COPY scrapers/ ./scrapers/
+COPY services/ ./services/
+COPY utils/ ./utils/
+COPY workers/ ./workers/
 COPY api_server_production.py .
 COPY config.yaml .