fix(init-db): add V2 consulting fields to conversations table

Add missing V2 fields to init-db.sql to match conversation.entity.ts:
- consulting_stage
- consulting_state
- collected_info
- recommended_programs
- conversion_path
- device_info

Also add indexes for the new fields.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

scripts/init-db.sql

@@ -87,6 +87,19 @@ CREATE TABLE conversations (
     feedback TEXT,
     -- 是否转化为付费（用于统计转化率）
     has_converted BOOLEAN DEFAULT FALSE,
+    -- ========== V2咨询流程字段 ==========
+    -- 当前咨询阶段
+    consulting_stage VARCHAR(30) DEFAULT 'greeting',
+    -- 咨询状态（完整的状态对象）
+    consulting_state JSONB,
+    -- 已收集的用户信息
+    collected_info JSONB,
+    -- 推荐的移民方案
+    recommended_programs TEXT[],
+    -- 转化路径（用户选择的下一步）
+    conversion_path VARCHAR(30),
+    -- 用户设备信息
+    device_info JSONB,
     -- 创建时间
     created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
     -- 更新时间
@@ -105,6 +118,10 @@ CREATE INDEX idx_conversations_status ON conversations(status);
 CREATE INDEX idx_conversations_category ON conversations(category);
 CREATE INDEX idx_conversations_created_at ON conversations(created_at DESC);
 CREATE INDEX idx_conversations_has_converted ON conversations(has_converted) WHERE has_converted = TRUE;
+-- V2索引
+CREATE INDEX idx_conversations_consulting_stage ON conversations(consulting_stage);
+CREATE INDEX idx_conversations_conversion_path ON conversations(conversion_path);
+CREATE INDEX idx_conversations_collected_info ON conversations USING GIN(collected_info);
 
 -- ===========================================
 -- 消息表 (messages)