fix: replace bare except clauses in LlavaService and CogAgentService

[nuthalapativarun]

Summary

• Replace bare except: with except Exception: in LlavaService and CogAgentService

Changes

ufo/llm/llava.py and ufo/llm/cogagent.py — both services share the same retry pattern: on API error the outer except Exception as e logs the error, then a nested try/except attempts to log the raw response object. The inner except was bare, which can suppress SystemExit and KeyboardInterrupt. Changed to except Exception: to match the outer handler.

[nuthalapativarun]

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