Chore/wire ops queue view to domain queue builder

[AAdewunmi]

Summary

This PR wires the Ops queue page to the shared domain queue builder and updates docs/UI to reflect the current project state and roadmap.

What changed

• Merged policylens/apps/ops/views.py to use build_queue_queryset(...) for queue ordering/filtering parity with the API.
• Added queue filter handling in view context:
  • status
  • priority
  • sla
• Added computed queue_rank for stable ranked display in the UI.
• Added claim_detail_view(...) scaffold with optimised related loading (select_related/prefetch_related) for upcoming detail page work.
• Merged policylens/apps/ops/templates/ops/queue.html:
  • Added filter form + reset
  • Added empty-state block
  • Added ranked queue table with SLA badges
  • Added claim links pointing to ops:claim-detail
• Updated README.md to clearly separate Implemented vs Planned work with explicit milestone/date labels and corrected current-state setup details.

Why

• Ensures Ops queue behaviour matches canonical domain/API ordering rules.
• Improves operational visibility with filterable, ranked queue UI.
• Reduces README drift by distinguishing shipped functionality from roadmap items.

Notes / follow-ups

• ops:claim-detail is referenced in the queue template and claim_detail_view exists, but URL wiring/template completion is follow-up work if not included in this PR.
• Local lint/test execution was limited in this environment (missing host ruff, Docker daemon unavailable).

[codecov]

Codecov Report

❌ Patch coverage is 80.00000% with 3 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
policylens/apps/ops/views.py	80.00%	3 Missing ⚠️

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