⚡ Bolt: Optimize polymorphic timeout validation

[ManupaKDU]

💡 What: Added a fast-path for integer type timeouts in is_reachable to avoid redundant string length checks and try...except block parsing.
🎯 Why: To bypass redundant validation steps on the hot-path when the timeout parameter is already an integer.
📊 Impact: Microsecond-level CPU savings per call, which reduces overhead in high-frequency loops.
🔬 Measurement: Verified via unit tests (python3 -m unittest test_testping1.py) ensuring no functionality regressions.

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PR created automatically by Jules for task 17127732231345236275 started by @ManupaKDU

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