[loop-cycle-932] fix: add logging to bare except Exception blocks (#484) (#501)

src/dashboard/routes/system.py

@@ -166,7 +166,7 @@ async def api_briefing_status():
         if cached:
             last_generated = cached.generated_at.isoformat()
     except Exception:
-        pass
+        logger.debug("Failed to read briefing cache")
 
     return JSONResponse(
         {
@@ -190,6 +190,7 @@ async def api_memory_status():
         stats = get_memory_stats()
         indexed_files = stats.get("total_entries", 0)
     except Exception:
+        logger.debug("Failed to get memory stats")
         indexed_files = 0
 
     return JSONResponse(
@@ -215,7 +216,7 @@ async def api_swarm_status():
             ).fetchone()
             pending_tasks = row["cnt"] if row else 0
     except Exception:
-        pass
+        logger.debug("Failed to count pending tasks")
 
     return JSONResponse(
         {