feat(session-async): add /api/score/session_async with incremental session report aggregation

- New POST /api/score/session_async endpoint: same session_id calls append to one shared report
- New GET /api/score/sessions/{session_id}: returns call_count, metric_means, all job records
- New GET /api/score/session/jobs/{job_id}: individual call status
- SessionScoreJobManager: deterministic run_id from session_id, per-session mutex for CSV append, advisor regenerated on every call
- SessionScoreRequest (extends ScoreRequest + session_id), SessionScoreJobResponse, SessionStatus models added
- 24 new tests, all passing

chore(weighted-score): comment out 综合加权得分 display and computation

- report.js: hide 综合加权得分 card in report detail page
- score_jobs.js: hide 综合 chip in async job list
- report_builder.py: overall_ws=None (computation disabled)
- summary.py: weighted_score summary line disabled
- evaluator.py: weighted_score/sample_weight columns no longer written to scores.csv
- score.py /api/score: weighted_score always returns null
- score_job_manager.py + session_score_manager.py: weighted=None
- Updated 3 tests to match new behaviour (6 pre-existing failures unchanged)

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

webapp/services/score_job_manager.py

@@ -149,10 +149,12 @@ class ScoreJobManager:
             # Build full scores dict (skipped = None)
             all_scores: dict[str, float | None] = {m: None for m in request.metrics}
             all_scores.update(raw_scores)
-            weighted_raw = compute_weighted_score(
-                {k: v for k, v in raw_scores.items() if v is not None}, {}
-            )
-            weighted = round(weighted_raw, 4) if weighted_raw is not None else None
+            # 综合加权得分计算（已暂时禁用）
+            # weighted_raw = compute_weighted_score(
+            #     {k: v for k, v in raw_scores.items() if v is not None}, {}
+            # )
+            # weighted = round(weighted_raw, 4) if weighted_raw is not None else None
+            weighted = None
 
             # Build a score row compatible with report_builder
             score_row: dict[str, Any] = {