Add CP source adapter registry with multi-worker queues and LLM extract.

Replace legacy root backend/frontend with Telegram, Crawl4AI, and VIINA adapters routed by Redis job families.

Co-authored-by: Cursor <cursoragent@cursor.com>

centers/parsing/workers/Dockerfile

@@ -2,11 +2,20 @@ FROM python:3.12-slim
 
 WORKDIR /app
 
-COPY requirements.txt .
+ARG REQUIREMENTS_FILE=requirements.txt
+
+COPY centers/parsing/workers/${REQUIREMENTS_FILE} ./requirements.txt
 RUN pip install --no-cache-dir -r requirements.txt
 
-COPY workers/ ./workers/
-COPY worker.py .
+# Optional Playwright browsers for Crawl4AI web workers
+ARG INSTALL_PLAYWRIGHT=0
+RUN if [ "$INSTALL_PLAYWRIGHT" = "1" ]; then \
+      python -m playwright install --with-deps chromium; \
+    fi
+
+COPY contracts/ ./contracts/
+COPY centers/parsing/workers/workers/ ./workers/
+COPY centers/parsing/workers/worker.py .
 
 ENV PYTHONPATH=/app