Refactor histogram bin calculation to consistently respect max_bins

[shreya975]

Summary

This PR refactors the histogram bin calculation logic in histogram_compute to ensure consistent handling of the max_bins configuration.

Changes

• Removed reliance on NumPy's "auto" binning strategy
• Simplified bin calculation logic for better readability
• Ensured bins are always capped by max_bins
• Removed redundant fallback condition

Why

The previous implementation could lead to inconsistent bin sizes due to NumPy’s automatic bin selection. This update ensures predictable and controlled histogram behavior.

Impact

• Improves consistency of histogram generation
• Enhances readability and maintainability of the code
• No breaking changes expected

[shreya975]

Hi, I’ve simplified the histogram bin calculation to ensure it consistently respects max_bins and removed redundant logic. Please review and let me know if any changes are needed.