Prefer link endpoints for legacy accident IDs and allow explicit node selection. Read authoritative initial statuses and sources, verify source isolation, and separate direct isolation from newly disconnected supply nodes. Return validation errors as HTTP 422.
The node-first lookup misrouted adjacent Fengyang pipes 19025 and 19026 into unrelated regions. Regression cases fail against the previous algorithm and pass after this change.
Reorganize algorithm packages by business responsibility, move orchestration into services, and keep database access behind pooled repositories.
Harden analysis API validation, remove unsafe legacy simulation endpoints, and add regression and architecture boundary coverage.
BREAKING CHANGE: legacy algorithm module paths and obsolete simulation endpoints are removed.
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