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>

.env.example

@@ -11,3 +11,12 @@ TELEGRAM_SESSION_PATH=/data/telegram.session
 # Platform internals
 INTERNAL_TOKEN=dev-internal-token
 TEST_PI_API_KEY=test-pi-api-key-change-me
+
+# DeepSeek LLM for extract_mode=llm (Telegram unstructured + Crawl4AI LLM)
+# DEEPSEEK_API_KEY=sk-...
+# DEEPSEEK_BASE_URL=https://api.deepseek.com
+# DEEPSEEK_MODEL=deepseek-chat
+
+# CP adapter workers (set in docker-compose; override locally if needed)
+# ENABLED_ADAPTERS=telegram
+# WORKER_FAMILIES=telegram