fix(arreflect): validate primitive conversion assignment overflow checks

[fallintoplace]

Summary

Prevent silent corruption in arreflect primitive conversions by validating numeric assignment bounds before setting through reflection.

Why this fix

setPrimitiveValue used SetInt/SetUint/SetFloat directly for Arrow numeric types. That allowed values outside the target Go type range to wrap/truncate, so bad data could pass through without errors until consumed by fast paths relying on value integrity.

Changes

• Added explicit overflow checks with:
  • OverflowInt
  • OverflowUint
  • OverflowFloat
• Return ErrTypeMismatch-wrapped errors on overflow.
• Preserve existing valid conversion behavior.

Files

• arrow/array/arreflect/reflect_arrow_to_go.go
• arrow/array/arreflect/reflect_arrow_to_go_test.go

Validation

• Added tests for overflow cases:
  • int64 -> int8
  • uint64 -> uint8
  • float64 -> float32

Bug details

• Severity: 82/100
• Ask product?: 0/100