fix(growth): MEDIUM-12 ProfileUpdater 补齐 5 维度画像更新

根因: ProfileUpdater 只处理 industry 和 communication_style 2/5 维度，
跳过 recent_topic、pain_point、preferred_tool。

修复:
- ProfileFieldUpdate 添加 kind 字段 (SetField | AppendArray)
- collect_updates() 现在处理全部 5 个维度:
  - industry, communication_style → SetField (直接覆盖)
  - recent_topic, pain_point, preferred_tool → AppendArray (追加去重)
- growth.rs 根据 ProfileUpdateKind 分派到不同的 UserProfileStore 方法:
  - SetField → update_field()
  - AppendArray → add_recent_topic() / add_pain_point() / add_preferred_tool()
- ProfileUpdateKind re-exported from lib.rs

测试: test_collect_updates_all_five_dimensions 验证 5 个维度 + 2 种更新类型

crates/zclaw-runtime/src/growth.rs

@@ -325,10 +325,40 @@ impl GrowthIntegration {
             let updates = self.profile_updater.collect_updates(&combined);
             let user_id = agent_id.to_string();
             for update in updates {
-                if let Err(e) = profile_store
-                    .update_field(&user_id, &update.field, &update.value)
-                    .await
-                {
+                let result = match update.kind {
+                    zclaw_growth::ProfileUpdateKind::SetField => {
+                        profile_store
+                            .update_field(&user_id, &update.field, &update.value)
+                            .await
+                    }
+                    zclaw_growth::ProfileUpdateKind::AppendArray => {
+                        match update.field.as_str() {
+                            "recent_topic" => {
+                                profile_store
+                                    .add_recent_topic(&user_id, &update.value, 10)
+                                    .await
+                            }
+                            "pain_point" => {
+                                profile_store
+                                    .add_pain_point(&user_id, &update.value, 10)
+                                    .await
+                            }
+                            "preferred_tool" => {
+                                profile_store
+                                    .add_preferred_tool(&user_id, &update.value, 10)
+                                    .await
+                            }
+                            _ => {
+                                tracing::warn!(
+                                    "[GrowthIntegration] Unknown array field: {}",
+                                    update.field
+                                );
+                                Ok(())
+                            }
+                        }
+                    }
+                };
+                if let Err(e) = result {
                     tracing::warn!(
                         "[GrowthIntegration] Profile update failed for {}: {}",
                         update.field,