extend feature to create tables from pyarrow objects to include datetime/time/timestamp types

[akkik04]

Summary

This PR addresses #605.

Specifically:

• pa.date32() is now mapped to Date32
• pa.date64() is mapped to DateTime64(3) (preserving millisecond precision)
• pa.timestamp('s', tz=None) → DateTime
• pa.timestamp('s', tz='TZ') → DateTime('TZ')
• pa.timestamp('ms', tz=None) → DateTime64(3)
• pa.timestamp('us', tz=None) → DateTime64(6)
• pa.timestamp('ns', tz=None) → DateTime64(9)
• pa.timestamp('ms', tz='TZ') → DateTime64(3, 'TZ'), etc.

Checklist

Delete items not relevant to your PR:

• Unit and integration tests covering the common scenarios were added
• A human-readable description of the changes was provided to include in CHANGELOG
• For significant changes, documentation in https://github.com/ClickHouse/clickhouse-docs was updated with further explanations or tutorials

[Copilot]

Pull request overview

This PR extends PyArrow-to-ClickHouse table creation support to handle datetime, date, and timestamp types, addressing issue #605. Previously, these types would raise unsupported type errors.

Key changes:

• Added mappings for PyArrow date32, date64, and timestamp types to corresponding ClickHouse DateTime/Date types
• Preserves precision and timezone information when converting timestamp types
• Updated tests to verify datetime type conversion and remove outdated unsupported type checks

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

File	Description
clickhouse_connect/driver/ddl.py	Implements datetime/timestamp type mappings in _arrow_type_to_ch function with precision and timezone handling
tests/unit_tests/test_pyarrow_ddl.py	Adds comprehensive unit tests for datetime type mappings and updates unsupported type test to use list type instead of timestamp
tests/integration_tests/test_pyarrow_ddl_integration.py	Adds end-to-end integration test validating datetime table creation and data insertion
CHANGELOG.md	Documents the new datetime/timestamp support feature

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[joe-clickhouse]

Looks good!