diff --git a/.claude/settings.local.json b/.claude/settings.local.json
index 2398331..dd6b538 100644
--- a/.claude/settings.local.json
+++ b/.claude/settings.local.json
@@ -19,7 +19,11 @@
       "Bash(python3 -c \":*)",
       "Bash(python -c ':*)",
       "Bash(node_modules/.bin/tsc --noEmit)",
-      "Bash(./node_modules/.bin/tsc --noEmit)"
+      "Bash(./node_modules/.bin/tsc --noEmit)",
+      "Bash(python -m py_compile \"C:/Users/Professional/Documents/VSCode/utp_service/backend/app/services/sse.py\")",
+      "Bash(python -m py_compile \"C:/Users/Professional/Documents/VSCode/utp_service/backend/app/services/discovery/orchestrator.py\")",
+      "Bash(python -m py_compile \"C:/Users/Professional/Documents/VSCode/utp_service/backend/app/services/discovery/config_parser.py\")",
+      "Bash(python -m py_compile \"C:/Users/Professional/Documents/VSCode/utp_service/backend/app/routers/objects.py\")"
     ]
   }
 }
diff --git a/backend/app/services/discovery/orchestrator.py b/backend/app/services/discovery/orchestrator.py
index 1232139..2a8c5ed 100644
--- a/backend/app/services/discovery/orchestrator.py
+++ b/backend/app/services/discovery/orchestrator.py
@@ -172,7 +172,7 @@ async def discover_via_ssh(
             except Exception as exc:
                 # Session is now invalid after a failed flush — capture the error so we can
                 # still emit disc_rack_done before propagating and aborting discovery.
-                _flush_error = RuntimeError(f"DB flush failed after rack {rack_host}: {exc}") from exc
+                _flush_error = exc
 
         except Exception as exc:
             # Unexpected per-rack error (e.g. SSH timeout, config parse failure not caught
@@ -188,7 +188,7 @@ async def discover_via_ssh(
         })
 
         if _flush_error:
-            raise _flush_error
+            raise RuntimeError(f"DB flush failed after rack {rack_host}: {_flush_error}") from _flush_error
 
     # ── Phase 2.5: Slave rack discovery via ARP ───────────────────────────────
     all_rack_ips_set = {h for _, h, _, _ in rack_hosts}