feat: add detailed logging to all API routes and global access log middleware

Each API module now logs:
- evaluations: trigger (scenario path, task_id), status polls, list
- runs: list (count), detail (run_id, metrics, sample counts)
- scenarios: list (total, valid, error counts)
- pipeline: submit (docs_path, models, max_docs), status polls, list
- llm_profiles: CRUD ops (name, model, id), probe/test (model, ok, latency), apply (patched fields)
- score: already had per-request logging

Global middleware (webapp.access logger):
- Every API request: METHOD path -> status (latency_ms) at INFO
- Static file requests demoted to DEBUG to reduce noise

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

webapp/api/runs.py

@@ -2,31 +2,42 @@
 
 from __future__ import annotations
 
+import logging
+
 from fastapi import APIRouter, HTTPException
 
 from webapp.models import RunDetail
 from webapp.services import report_builder, run_reader
 
 router = APIRouter(prefix="/api/runs", tags=["runs"])
+logger = logging.getLogger("webapp.api.runs")
 
 
 @router.get("")
 def get_runs() -> dict[str, list]:
     """Return summaries for every discoverable evaluation run."""
     summaries = run_reader.list_run_summaries()
+    logger.info("[get_runs] found %d runs", len(summaries))
     return {"runs": [summary.model_dump() for summary in summaries]}
 
 
 @router.get("/{run_id}")
 def get_run_detail(run_id: str) -> RunDetail:
     """Return the full summary and aggregated report for one run."""
+    logger.info("[get_run_detail] run_id=%s", run_id)
     run_dir = run_reader.find_run_dir(run_id)
     if run_dir is None:
+        logger.warning("[get_run_detail] not found  run_id=%s", run_id)
         raise HTTPException(status_code=404, detail=f"未找到运行: {run_id}")
 
     summary = run_reader.build_run_summary(run_dir)
     if summary is None:
+        logger.warning("[get_run_detail] missing metadata  run_id=%s", run_id)
         raise HTTPException(status_code=404, detail=f"运行元数据缺失: {run_id}")
 
     report = report_builder.build_report(run_dir, summary.metrics)
+    logger.info(
+        "[get_run_detail] ok  run_id=%s  metrics=%s  valid=%d  invalid=%d",
+        run_id, summary.metrics, summary.valid_samples, summary.invalid_samples,
+    )
     return RunDetail(summary=summary, report=report)