feat: preserve conversation content-part metadata

[radu-mocanu]

Summary

• preserve content-part metadata when conversation history is deserialized
• keep the wire alias compatible with the existing conversation contract
• cover serialization and deserialization round trips

Validation

• full uipath-core test suite passes
• ruff and focused mypy pass
• lockfile is current

[Copilot]

Pull request overview

This PR updates the uipath-core chat conversation models to preserve content-part metaData through Pydantic deserialization/serialization, keeping the wire alias (metaData) compatible with the existing conversation contract and adding a round-trip regression test.

Changes:

• Added metadata (alias="metaData") to UiPathConversationContentPartData so content-part metadata survives deserialization.
• Added a unit test covering deserialize → model access → serialize (by_alias=True) round-trip for content-part metadata.
• Bumped uipath-core version to 0.5.31 (and updated lockfile accordingly).

Reviewed changes

Copilot reviewed 3 out of 4 changed files in this pull request and generated no comments.

File	Description
packages/uipath-core/src/uipath/core/chat/content.py	Adds metadata field (wire alias metaData) to content-part data model to preserve metadata on round trips.
packages/uipath-core/tests/chat/test_message.py	Adds test asserting metaData is preserved on parse and emitted on dump with aliases.
packages/uipath-core/pyproject.toml	Version bump to 0.5.31.
packages/uipath-core/uv.lock	Lockfile updated for the version bump.

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
100.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[github-actions]

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