feat: implement mvp with email-first login flow and langgraph architecture

docker-compose.yml

@@ -0,0 +1,18 @@
+services:
+  history-db:
+    image: postgres:16
+    container_name: ea-history-db
+    restart: unless-stopped
+    environment:
+      POSTGRES_DB: ${HISTORY_DB_NAME:-ea_history}
+      POSTGRES_USER: ${HISTORY_DB_USER:-user}
+      POSTGRES_PASSWORD: ${HISTORY_DB_PSWD:-password}
+    ports:
+      - "5433:5432"
+    volumes:
+      - ./postgres-data:/var/lib/postgresql/data
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U $${POSTGRES_USER} -d $${POSTGRES_DB}"]
+      interval: 10s
+      timeout: 5s
+      retries: 5