feat: add skill and assistant knowledge bases

offline-backend-20260512/backend/README.md

@@ -953,3 +953,30 @@ The final rewrite commit uses a deliberately short sibling temporary filename,
 which keeps long Windows artifact paths below the path-length limit. It also
 recreates a missing `outputs` parent before retrying, so transient
 sandbox-directory recreation cannot discard a completed rewrite.
+
+## Skill knowledge distillation and assistant knowledge
+
+The Gateway now exposes an administrator-only skill distillation pipeline at
+`/api/skill-knowledge`. A matrix job can send up to 200 skills to multiple
+WeKnora or global assistant-knowledge targets. The scanner never reads or
+uploads code/script files, strips Markdown code fences, blocks credential-like
+files and content, safely inspects ZIP members, and converts supported
+Office/PDF/spreadsheet files off the event loop. Jobs use database claims and
+renewable leases, stage snapshots before activation, retain the prior active
+version on failure, support per-item retry and entity/relation review, and keep
+per-binding contribution records for safe detach/delete.
+
+Bindings may opt into debounced file watching and cron synchronization through
+`/api/skill-knowledge/auto-sync-settings`. Only non-code knowledge digests can
+mark a binding stale. WeKnora Wiki, document, FAQ, conversation-archive and
+read-only sidecar targets have separate projections. Optional Neo4j direct
+writes are disabled by default under `llmwiki.weknora.graph`; when enabled they
+use only fixed parameterized templates and Neo4j's transactional HTTP endpoint.
+
+`/api/assistant-knowledge` owns exactly one global DeerFlow-native base named
+`知识梳理`. Reads and search are available to authenticated users; initialization,
+local-file import, WeKnora export/import, source reimport/delete, and revision
+rollback are admin-only. Imports align canonical entities and relations while
+retaining source contributions, publish source/entity/relation Wiki revisions,
+and remove canonical knowledge only after its final contribution disappears.
+The database schema is introduced by Alembic revision `20260901_01`.