fix: replace 3 bare except clauses with except Exception

benchmarks/gpu_benchmark_modal.py

@@ -50,7 +50,7 @@ def gpu_simulated_annealing(
     # Get GPU info
     try:
         gpu_info = subprocess.check_output(['nvidia-smi', '--query-gpu=name', '--format=csv,noheader'], text=True).strip()
-    except:
+    except Exception:
         gpu_info = "T4"
 
     start_time = time.time()

shared/block_synchronizer.py

@@ -99,7 +99,7 @@ async def sync_blocks(self, start_index: int, end_index: int) -> bool:
             for _ in range(num_producers):
                 try:
                     download_queue.put(None)  # Sentinel value to stop producers
-                except:
+                except Exception:
                     pass  # Queue might be full or closed
 
             for p in producer_processes:

tools/find_block_time_threshold.py

@@ -128,7 +128,7 @@ def test_mining_time(
                 elapsed = time.time() - start_time
                 try:
                     result = result_queue.get_nowait()
-                except:
+                except Exception:
                     result = None
         else:
             # No timeout - run directly