Fixing the knowledge_create_test compile error in this branch let the
internal/application/service test package run for the first time, which
exposed two latent failures introduced when GetKnowledgeByID started
eagerly loading tags:
- GetOwningKBCreatorID went through the service-level GetKnowledgeByID
(which now calls repo.GetKnowledgeTags); ownership resolution only
needs the knowledge -> kb_id link, so resolve via repo.GetKnowledgeByID
directly (tenant-scoped) and drop the extra tag query.
- createKnowledgeFileRepoStub lacked GetKnowledgeTags, which the create
path always invokes via setAndAttachKnowledgeTags; add the stub method.
wizardchen
6ad75d19fd