Bare except: and file handle leaks in multiple modules

[xuuuuuuu9]

Description

Found multiple bare except: patterns that swallow KeyboardInterrupt and SystemExit, and file handle leaks from missing with context managers.

Issues fixed

Bare except: (5 locations in 3 files):

• python_executor.py: 3 bare except: in code execution path — makes the process unkillable when hanging
• format_utils.py: 1 bare except: — swallows KeyboardInterrupt during title extraction
• modeling_flash_llama.py: 1 bare except: — flash-attn version fallback

File handle leaks (2 locations in 1 file):

• mathbook_question_extract.py: json.load(open(...)) without context manager — file descriptors not closed

Fix

• Changed all bare except: to except Exception: or except AttributeError: (more specific)
• Changed json.load(open(...)) to with open(...) as f: json.load(f)

[See PR for details]

[mahmut-Abi]

done