⚡ Bolt: [performance improvement] Optimize CC3D field access

[NoWon1]

💡 What: Replaced slow try...except blocks with explicit bounds checking (0 <= x < self.dim.x and 0 <= y < self.dim.y) in spatial loops.
🎯 Why: Out-of-bounds SWIG object lookups in CompuCell3D throw exceptions that incur significant overhead when caught by try...except blocks in tightly nested spatial loops.
📊 Impact: Eliminates exception handling overhead in tight loops and replaces hardcoded loop dimensions (500) with dynamic dimensions (self.dim.x), reducing execution time.
🔬 Measurement: The optimization was validated with a standalone benchmark (test_perf_cc3d.py) and standard tests were run with python -m pytest.

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PR created automatically by Jules for task 13899851659313286489 started by @NoWon1

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