Bump to version 4.4.0

[vikrantpuppala]

Summary

Bump version to 4.4.0 and add the 4.4.0 section to CHANGELOG.md.

This release is versioned 4.4.0 (minor) rather than a patch because it raises the minimum supported Python to 3.10 (dropping end-of-life 3.8/3.9), which changes the install contract for downstream users.

Notable changes since 4.3.0

• Raised the minimum supported Python version to 3.10, dropping the end-of-life 3.8/3.9, to update the lockfile and clear CVE-flagged dependencies in the repo (Add OSV-Scanner security gate + clear all CVEs (Python floor to 3.10) #798)
• Fix: REMOVE staging operations no longer require staging_allowed_local_path to be set (REMOVE operation requires staging_allowed_local_path to be set, even though no local file is required #726)
• Report cursor.rowcount for DML on the Thrift backend; executemany aggregates the count across parameter sets per PEP 249 ([Feature Request] Support rowcount for DML operation #784)

Test plan

• pytest tests/unit/ passes locally (879 passed, realkernel test passes in its required isolated invocation)
• Multi-DBR suites in universe/peco/correctness/python passed on Python 3.12: PythonSuite (thrift + SEA) and PythonUnityCatalogSuite (thrift)
• CI green

This pull request was AI-assisted by Isaac.

[peco-review-bot]

✅ No issues identified by the review bot.

[msrathore-db]

Good luck