Plan 01-01 (Wave 1): Package scaffold with HTTPClient + tenacity retry (min=10s)
+ stdlib logging + BaseFetcher/BaseSearcher base classes + pyproject.toml.
Covers ARCH-01, ARCH-02, QUAL-04, QUAL-05.
Plan 01-02 (Wave 2): Sign algorithm migration (Boss/Job51/Zhilian) to
crawler_core/ + comprehensive unit tests — no HTTP, no mocks, pure functions.
Covers QUAL-01. 24+ test cases across 3 test files.
ROADMAP updated: Phase 1 now shows 2 concrete plans instead of TBD.
