feat(launcher): prune old run logs (L-2)

src/main.py

@@ -60,6 +60,22 @@ async def lifespan(app: FastAPI):
     if requeued:
         log.warning(f"Queue-recovery: requeued {requeued} running job(s) after restart")
 
+    # L-2: rotate old per-run logs at startup (best-effort; never fatal).
+    try:
+        import os as _os
+        from .config import settings as _settings
+        from .agents.launcher import prune_run_logs
+        _runs_dir = _os.path.join(_os.path.dirname(_settings.db_path), "runs")
+        _removed = prune_run_logs(
+            _runs_dir,
+            keep_days=_settings.log_keep_days,
+            keep_max=_settings.log_keep_max,
+        )
+        if _removed:
+            log.info(f"Log rotation: pruned {_removed} old run log(s) from {_runs_dir}")
+    except Exception as e:
+        log.warning(f"Log rotation skipped: {e}")
+
     # Start the background job-queue worker (ORCH-1).
     from .queue_worker import worker
     worker.start()