[MCC-1476022] - Add Dry Publish Function

[slingampalli-mdsol]

[MCC-1476022] - Add Dry Publish Function

Changes

• Added dry publish feature
  • Introduced new DTOs/models for dry publish (PublishRequest, DryPublishResponse, DryPublishResult) and exported them appropriately
  • Added dry_publish() to the service interface, default service implementation, and client façade
  • added mapper dry_publish_response_to_domain.
  • Implemented Arrow Flight transport dry_publish_dataset() using do_put, schema normalization, and two-phase metadata parsing
  • added comprehensive unit tests.

[Copilot]

Pull request overview

Adds a “dry publish” (validation-only publish) flow to the DataConnect Python SDK, spanning transport → service → client layers, and introduces a domain result model plus unit tests to validate request/response mapping.

Changes:

• Introduced new DTOs/models for dry publish (PublishRequest, DryPublishResponse, DryPublishResult) and exported them appropriately.
• Added dry_publish() to the service interface, default service implementation, and client façade; added mapper dry_publish_response_to_domain.
• Implemented Arrow Flight transport dry_publish_dataset() using do_put, schema normalization, and two-phase metadata parsing; added comprehensive unit tests.

Reviewed changes

Copilot reviewed 11 out of 11 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
tests/test_dry_publish.py	New unit tests covering type normalization, mapping, service request building/error translation, and transport behavior.
dataconnect/transport/models.py	Adds transport-layer DTOs for dry publish request/response.
dataconnect/transport/base.py	Extends the transport ABC with dry_publish_dataset().
dataconnect/transport/arrow_flight/transport.py	Implements dry_publish_dataset() plus Arrow type normalization helper.
dataconnect/transport/init.py	Exposes newly added transport DTOs in the public transport package API.
dataconnect/service/mappers.py	Adds mapping from DryPublishResponse to domain DryPublishResult.
dataconnect/service/default.py	Adds DefaultDataConnectService.dry_publish() building config JSON and delegating to transport.
dataconnect/service/base.py	Extends the service interface with dry_publish().
dataconnect/models.py	Introduces domain model DryPublishResult.
dataconnect/client.py	Adds DataConnectClient.dry_publish() delegating to the service.
dataconnect/init.py	Exports DryPublishResult at package top-level.

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