The legacy dataset console rate limits every mutating, download, and
retrieval route and the dataset service API limits every request, while
KnowledgeFS only covered uploads and query admission. Apply the knowledge
rate limit to all space-scoped POST/PUT/PATCH/DELETE console routes, the
document downloads, and research/query entrypoints (workspace-level source
previews, staged-upload discards, the deprecated buffered query route, and
the internal stream transport stay exempt). Extract the service API check
into `check_knowledge_rate_limit` and call it from the KnowledgeFS profile
helper so all service routes share the legacy per-workspace limit.
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_015zw5G5SX3HmVfnZof6YWAc
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