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wizardchen
4fb089d4d7
Five handler helpers (validateAndGetKnowledgeBase in knowledgebase.go,
validateKnowledgeBaseAccessWithKBID in knowledge.go, the kbService
guards in faq.go and tag.go, and getKnowledgeBaseForInitialization +
the per-kb config getter in initialization.go) wrapped every
GetKnowledgeBaseByID error — including the well-known
repository.ErrKnowledgeBaseNotFound sentinel — as
NewInternalServerError. The result was that every probe of a stale or
cross-tenant kb id surfaced as a 500 instead of the 404 it should have
been, both confusing clients ("real 5xx vs. wrong URL") and burning
ops attention on monitoring alerts.
The mapping pattern is the same as PR #1336 for sessions: detect the
sentinel via stderrors.Is and emit NewNotFoundError; everything else
still surfaces as a 500 so genuine DB / repo failures keep firing the
alerts that matter. Caught during the RBAC e2e smoke run on
feat/rbac, where a deliberate cross-tenant kb-id probe produced
HTTP 500 + body "knowledge base not found" — the smoking gun.
Tests: new internal/handler/knowledgebase_not_found_test.go covers
three cases — bare sentinel, fmt.Errorf("%w") wrapped sentinel
(regression guard against a future revert to `==`), and a non-sentinel
infrastructure error that must still 500. All three pass.
The full handler test package is green.