feat(mid-section-defect): full-line bidirectional defect trace center with dual query mode

Transform /mid-section-defect from TMTT-only backward analysis into a full-line
bidirectional defect traceability center supporting all detection stations.

Key changes:
- Parameterized station detection: any workcenter group as detection station
- Bidirectional tracing: backward (upstream attribution) + forward (downstream reject rates)
- Dual query mode: date range OR LOT/工單/WAFER container-based seed resolution
- Multi-select filters for upstream station, equipment model (RESOURCEFAMILYNAME), and loss reasons
- Progressive 3-stage trace pipeline (seed-resolve → lineage → events) with streaming UI
- Equipment model lookup via resource cache instead of SPECNAME
- Session caching, auto-refresh, searchable MultiSelect with fuzzy matching
- Remove legacy tmtt-defect module (fully superseded)
- Archive openspec change artifacts

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

scripts/check_full_modernization_gates.py

@@ -85,7 +85,6 @@ def _route_css_targets() -> dict[str, list[Path]]:
         "/resource-history": [ROOT / "frontend/src/resource-history/style.css"],
         "/qc-gate": [ROOT / "frontend/src/qc-gate/style.css"],
         "/job-query": [ROOT / "frontend/src/job-query/style.css"],
-        "/tmtt-defect": [ROOT / "frontend/src/tmtt-defect/style.css"],
         "/admin/pages": [ROOT / "src/mes_dashboard/templates/admin/pages.html"],
         "/admin/performance": [ROOT / "src/mes_dashboard/templates/admin/performance.html"],
         "/tables": [ROOT / "frontend/src/tables/style.css"],