feat(pricing): add cucloud and bytedance payg importers

- Add import_cucloud_pricing.go for 联通云 payg 公开价抓取
- Add import_bytedance_pricing.go for 火山引擎/ByteDance Ark 定价导入
- Include test files and sample testdata for both importers
- Update plan catalog inventory docs and seeds
- Add cucloud pricing importer implementation plan
- Align pipeline scripts and smoke gate tests

seeds/plan_catalog_inventory_seed_cn_relays_top20plus.json

@@ -514,6 +514,33 @@
       "catalogSegment": "relay_top20plus",
       "marketRank": 12
     },
+    {
+      "catalogCode": "cucloud-aisp-token-plan-pricing",
+      "providerName": "China Unicom",
+      "providerNameCn": "中国联通",
+      "providerCountry": "CN",
+      "providerWebsite": "https://www.cucloud.cn",
+      "operatorName": "Unicom AISP",
+      "operatorNameCn": "联通云 AI服务平台AISP",
+      "operatorCountry": "CN",
+      "operatorWebsite": "https://www.cucloud.cn",
+      "operatorType": "cloud",
+      "platformName": "Unicom AISP Token Plan Pricing",
+      "platformNameCn": "联通云 AISP Token Plan 定价",
+      "platformType": "cloud_operator",
+      "planFamily": "token_plan",
+      "planStatus": "confirmed",
+      "sourceKind": "official_pricing",
+      "sourceURL": "https://support.cucloud.cn/document/127/591/2357.html?id=2357&folderid=3236",
+      "sourceTitle": "Token Plan概述",
+      "region": "CN",
+      "currency": "CNY",
+      "billingCycle": "monthly",
+      "importerKey": "import_cucloud_pricing.go",
+      "notes": "已确认联通云 AISP Token Plan 公开披露 DeepSeek-V4-Pro / DeepSeek-V4-Flash / MiniMax-M2.5 三模型 blended 单价与区域支持矩阵；公开页仅确认按量计费模式存在，未披露 payg per-model 销售价表。",
+      "catalogSegment": "relay_top20plus",
+      "marketRank": 12
+    },
     {
       "catalogCode": "mobile-cloud-ai-market",
       "providerName": "China Mobile",
@@ -525,19 +552,19 @@
       "operatorCountry": "CN",
       "operatorWebsite": "https://ecloud.10086.cn",
       "operatorType": "cloud",
-      "platformName": "Mobile Cloud AI Market",
-      "platformNameCn": "移动云 AI 应用专区",
+      "platformName": "Mobile Cloud MoMA",
+      "platformNameCn": "移动云 模型服务平台MoMA",
       "platformType": "cloud_operator",
-      "planFamily": "unknown",
+      "planFamily": "pay_as_you_go",
       "planStatus": "confirmed",
-      "sourceKind": "official_product_page",
-      "sourceURL": "https://saas.ecloud.10086.cn/Store/List",
-      "sourceTitle": "移动云市场 AI 应用专区",
+      "sourceKind": "official_pricing",
+      "sourceURL": "https://ecloud.10086.cn/op-help-center/doc/article/91592",
+      "sourceTitle": "预置模型服务-token按量计费",
       "region": "CN",
       "currency": "CNY",
       "billingCycle": "usage",
-      "importerKey": "import_mobile_cloud_catalog.go",
-      "notes": "已确认移动云云市场公开展示 AI 应用专区，公开统一编程套餐价格仍待后续核验。",
+      "importerKey": "import_mobile_cloud_pricing.go",
+      "notes": "已确认移动云 MoMA 官方公开 token 按量计费文档；当前 importer 覆盖文本/视觉/向量/排序模型，语音模型的按字符/按秒计费暂未写入 region_pricing。",
       "catalogSegment": "relay_top20plus",
       "marketRank": 13
     },

seeds/plan_catalog_inventory_seed_cn_vendors_top20.json

@@ -104,8 +104,8 @@
       "region": "CN",
       "currency": "CNY",
       "billingCycle": "usage",
-      "importerKey": "existing_price_importer",
-      "notes": "官方模型与平台由火山方舟统一暴露，Coding Plan 另作订阅目录记录。",
+      "importerKey": "import_bytedance_pricing.go",
+      "notes": "官方模型与平台由火山方舟统一暴露；当前 importer 落地在线推理（常规）公开 token 价格，向量等仅输入计费模型暂不写入 region_pricing。",
       "catalogSegment": "vendor_top20",
       "marketRank": 4
     },