Initial commit: CRM AI Demo bridge + KB knowledge base + infrastructure

- Bridge server with LLM agent tool-use (search_kb, search_products, search_orders, search_inventory, escalate_human)
- pgvector RAG knowledge base (95 FAQ chunks)
- Auto opportunity creation in Twenty CRM
- Auto follow-up task workflow
- Chatwoot AgentBot integration (HMAC, webhook)
- Docker compose infrastructure (PG18, Redis 8.8, node24-alpine)
- Configuration templates (example files) - real secrets excluded via .gitignore

customer-service-kb/03-pre-order.md

@@ -0,0 +1,33 @@
+---
+title: Pre-order
+category: pre-order
+source: yehwang.com/pre-order.html (official FAQ, verbatim)
+source_url:
+  - https://www.yehwang.com/pre-order.html
+last_updated: 2026-06-25
+keywords: [pre-order, preorder, reserve, out of stock, delivery week, 5% discount, minimum 50 pieces, combine, first order required]
+---
+
+# Pre-order
+
+> 📎 来源 / Source: https://www.yehwang.com/pre-order.html · 抓取 2026-06-25
+
+### Q: What is a pre-order?
+Products that are currently out of stock can be **reserved and paid for in advance** through pre-orders. These products have already been reordered by us and are on their way to our warehouse. From pre-order to delivery it takes **approximately one month** before stock reaches our warehouse and we can dispatch your order.
+
+### Q: How do I know which products are pre-order products?
+Pre-order products are marked with a **PRE-ORDER** label on our website. A full overview is on our Pre-order products page.
+
+### Q: How do I know when my pre-order will be delivered?
+Each pre-order product shows an **expected delivery week** — the week we expect to receive the products into our warehouse (not the week you receive your order). You can combine products with different delivery weeks in one pre-order, but the gap between the earliest and latest availability **cannot exceed 3 weeks** (e.g. week 40 + week 42 is OK; week 40 + week 43 is not). Orders with mixed delivery weeks ship only after all items have arrived.
+
+### Q: Why can't I add a pre-order product to my cart?
+Two reasons:
+1. **Pre-order products cannot be combined with in-stock items** — they require two separate orders, and the minimum order value applies to each.
+2. **Pre-order items are only available to existing customers** — if you have never ordered from us before, pre-order items are not visible. Place a regular order first.
+
+### Q: Can I pre-order items that are (almost) out of stock?
+Yes. Contact customer service to place a personal pre-order. The **minimum quantity for a personal pre-order is 50 pieces**. Pre-ordering clothing must first be confirmed with our supplier.
+
+### Q: Why do I get a discount on pre-order items?
+Pre-order products get a **5% discount** because they haven't arrived in our warehouse yet and you wait a bit longer for shipment. Once they arrive, the price reverts to the regular selling price.