feat(ops): wire claim detail view with full timeline data prefetching

[AAdewunmi]

Summary

Wire claim_detail_view to load all timeline-related data in one deterministic query plan so the claim detail page renders consistently and with fewer DB round trips.

Changes

• Updated policylens/apps/ops/views.py claim_detail_view to:
  • use select_related("policy", "policy__holder", "sla_clock", "ml_score")
  • use prefetch_related(...) with ordered Prefetch(...) querysets for:
    • documents ordered by uploaded_at
    • notes ordered by created_at
    • decisions ordered by decided_at
    • audit_events ordered by created_at
• Added page_title to detail-page render context.
• Kept route and template behavior intact (no template or URL changes in this PR).

Why

• Reduces N+1 query risk on claim detail rendering.
• Makes section ordering deterministic for timeline/document/note/decision displays.
• Centralizes data-loading strategy in the view, keeping this PR focused on performance + determinism.

Scope / Non-goals

• No UI/layout changes.
• No routing changes (/ops/claims/<id>/ already exists).
• No model/schema/API contract changes.

Validation

• Confirmed claim detail route remains /ops/claims/<id>/.
• Verified ordered related collections render through the existing template using preloaded data.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

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