* feat(api): add text moderation endpoint
Add an OpenAI-compatible /v1/moderations endpoint backed by constrained local text generation. Register its auth and discovery surfaces, document the text-only MVP, and cover response shaping and access control.
Assisted-by: Codex:gpt-5
* test(mcp): update assistant client stub
Keep the LocalAI Assistant holder test stub aligned with the scheduling methods added to LocalAIClient so repository-wide type checking succeeds.\n\nAssisted-by: Codex:gpt-5
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Co-authored-by: localai-org-maint-bot <306269227+localai-org-maint-bot@users.noreply.github.com>