- 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
- coreshub_pricing_lib.go: CoreHub pricing data extraction and parsing
- import_coreshub_pricing.go: importer with dry_run support
- import_coreshub_pricing_test.go: unit tests for importer
- coreshub_pricing_sample.txt: test fixture
