Import ClientFlow production v4928.1.5.132.4

RELEASE_NOTES_v4928_1_5_6.md

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+# Release v4928.1.5.6 — Safe Email Reply Agent Phase 1
+
+## Added
+
+- Optional OpenAI Responses API + file_search email reply agent.
+- New `app/email_reply_agent_service.py`.
+- `message_drafts.metadata.email_agent` with intent, priority, confidence, review flag and knowledge summary.
+- Internal API endpoint `POST /api/internal/tasks/{task_id}/reply-draft`.
+- Admin UI badge/agent status display.
+
+## Safety
+
+- Draft-only; no automatic sending.
+- Fallback to existing ClientFlow reply assistant if agent is disabled or unavailable.
+- Hard no-reply/internal templates are not overridden by the agent.
+- Server-side reply safety validation remains active.
+
+## Configuration
+
+Set:
+
+```env
+CLIENTFLOW_EMAIL_REPLY_AGENT_ENABLED=true
+OPENAI_API_KEY=sk-proj-...
+OPENAI_VECTOR_STORE_ID=vs_...
+```
+
+Keep `false` to preserve the previous behavior.