fix: backfill symbol_demand for sidebar-added symbols + analyst ratings schema fix

- Add await ctx.cache.subscribe() to addSymbol mutation so symbols
  added via the sidebar get registered in symbol_demand and yfinance
  jobs are queued immediately
- Backfill PEP, WYNN, STZ, CELH into symbol_demand + adapter_queue
- Upgrade yahoo-finance2 3.15.3 -> 3.15.4 and pass validateResult:false
  to quoteSummary() to handle Yahoo schema drift
- Add error detail logging for analyst ratings schema failures
- Update .gitignore with common ignores

docker-compose.yml

@@ -0,0 +1,46 @@
+# Investor Flow — Docker Compose Deployment (Slice 26)
+# Self-hostable stack: Bun backend + Next.js frontend + SQLite volume.
+#
+# Usage:
+#   1. Copy .env.example to .env and fill in secrets
+#   2. docker compose up --build
+#   3. Frontend: http://localhost:3000
+#   4. Backend:  http://localhost:3001
+
+services:
+  backend:
+    build:
+      context: ./app/server
+      dockerfile: Dockerfile
+    ports:
+      - "3001:3001"
+    environment:
+      - NODE_ENV=production
+      - IFLOW_SESSION_SECRET=${IFLOW_SESSION_SECRET:-dev-secret-change-me}
+      - SEC_OPERATOR_EMAIL=${SEC_OPERATOR_EMAIL}
+      - X_COOKIE=${X_COOKIE}
+      - REDDIT_CLIENT_ID=${REDDIT_CLIENT_ID}
+      - REDDIT_CLIENT_SECRET=${REDDIT_CLIENT_SECRET}
+      - REDDIT_USER_AGENT=${REDDIT_USER_AGENT}
+      - LLM_PROVIDER_URL=${LLM_PROVIDER_URL:-http://localhost:1234/v1}
+      - FRED_API_KEY=${FRED_API_KEY}
+    volumes:
+      - sqlite-data:/app/data
+    restart: unless-stopped
+
+  frontend:
+    build:
+      context: ./app
+      dockerfile: Dockerfile
+    ports:
+      - "3000:3000"
+    environment:
+      - NEXT_PUBLIC_API_URL=http://backend:3001
+      - NODE_ENV=production
+    depends_on:
+      - backend
+    restart: unless-stopped
+
+volumes:
+  sqlite-data:
+    driver: local