Merge changelog and version from 54.3.1 into main

[timsaucer]

• bugfix: correct offsets when serializing a list of fixed sized list and non-zero start offset (bugfix: correct offsets when serializing a list of fixed sized list and non-zero start offset #7318)

• When serializing fixed length arrays, adjust the offsets for writing out

• Add unit test

• clippy warnings

• Add unit test for nulls

• Update unit test to account for which schema had nulls

• Add missing type annotation (Add missing type annotation #7326)

• Update version

• Create changelog

---

Which issue does this PR close?

• Relate to Release arrow-rs / parquet bug fix version 54.3.1 (Mar 2025) #7330
• Related to Backports, version bump and changelog for 54.3.1 #7331

Rationale for this change

What changes are included in this PR?

Are there any user-facing changes?

[timsaucer]

@alamb this is the requested PR to merge the changelog back into main

[alamb]

Thank you @timsaucer

[alamb]

it is strange that github is showing this in the diff. However, I verified this code is already on main so this PR doesn't change the cide

arrow-rs/arrow-ipc/src/writer.rs

Lines 1730 to 1750 in a01886d

	} else if let DataType::FixedSizeList(_, fixed_size) = data_type {
	assert_eq!(array_data.child_data().len(), 1);
	let fixed_size = *fixed_size as usize;
	let child_offset = array_data.offset() * fixed_size;
	let child_length = array_data.len() * fixed_size;
	let child_data = array_data.child_data()[0].slice(child_offset, child_length);
	offset = write_array_data(
	&child_data,
	buffers,
	arrow_data,
	nodes,
	offset,
	child_data.len(),
	child_data.null_count(),
	compression_codec,
	write_options,
	)?;
	return Ok(offset);
	} else {

🤷

[alamb]

And in fact the commit in main 0e73524 does not have these changes

[timsaucer]

DOH! My original PR never was merged into main! It was approved, but not merged.

[timsaucer]

It is now, via this.

[alamb]

DOH! My original PR never was merged into main! It was approved, but not merged.

No it was merged I just doubled checked 😅

• bugfix: correct offsets when serializing a list of fixed sized list and non-zero start offset #7318

The fact it showed up here in this PR I think is some sort of github rendering artifact