Scope HAE ingestion metrics per-user; show data coverage to all roles

[d3mocide]

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Summary

• Bug fix: HAE ingestion metrics (Ingestions, Rows in, Errors, Last success, Recent Ingestions) were stored in global Redis keys (luma:hae_metrics:totals), so every user saw the same system-wide counts. Keys are now scoped per-user: luma:hae_metrics:{user_id}:totals/events/meta.
• record_ingest() and snapshot() in hae_metrics.py now both require a user_id parameter. All six call sites in ingest.py pass user_id=user.id.
• Data coverage card (HaeDiagnosticCard) is no longer gated behind isOperator in the frontend — the backend already filters stored_metrics by user.id, so all users can see their own coverage. The payload analyzer (HaeAnalyzeCard) remains operator-only.

Test plan

• Log in as User A and ingest some HAE data → HAE Ingestion card shows counts for User A only
• Log in as User B (fresh account) → HAE Ingestion card shows 0 / empty, not User A's numbers
• Non-operator user sees the Data Coverage section (stored metrics table) on the Data Sources settings tab
• Non-operator user does NOT see the Payload Analyzer card
• Operator user still sees both Data Coverage and Payload Analyzer

https://claude.ai/code/session_01EB8QMvqDxdSw3FT4sfNht2
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