feat(dataplex): [dataplex] add DataProductService to manage data products and underlying data assets (#7612)

* feat(dataplex): add DataProductService to manage data products and underlying data assets
feat(dataplex): add MetadataFeed to CatalogService for tracking metadata changes
feat(dataplex): add LookupContext to CatalogService for LLM-generated resource context
feat(dataplex): add support for attaching aspects to EntryLinks
feat(dataplex): add UpdateEntryLink and LookupEntryLinks methods to CatalogService
feat(dataplex): support OneTime triggers for DataScan operations
feat(dataplex): add debug query support to Data Quality rules
feat(dataplex): allow selective generation scope for Data Documentation scans
feat(dataplex): add SKIPPED state to DataScan catalog publishing status
docs(dataplex): remove deprecated metadata change warnings in Dataplex Catalog

The DataProductService provides APIs to curate and manage collections of data assets as data products, enabling more organized sharing and usage for specific business cases.

MetadataFeeds allow users to monitor metadata changes (CREATE, UPDATE, DELETE) within a specified scope (organization, project, or entry group) and publish them to Pub/Sub.

CatalogService now includes a LookupContext API to provide LLM-generated context for resources, and enhanced EntryLink management, including the ability to attach aspects.

DataScan operations now support a OneTime trigger for single-run scans, and Data Quality rules support DebugQueries to help investigate rule failures by returning diagnostic values.

fix(dataplex)!: remove deprecated Explore-related methods and messages from public client libraries

Breaking Changes:
- Removed ContentService and all associated methods (CreateContent, UpdateContent, DeleteContent, GetContent, ListContent, etc.) and request/response messages.
- Removed Environment and Session management methods from DataplexService (CreateEnvironment, UpdateEnvironment, DeleteEnvironment, ListEnvironments, GetEnvironment, ListSessions) and their associated messages.

PiperOrigin-RevId: 883306841

Source-Link: googleapis/googleapis@69ca7ae

Source-Link: googleapis/googleapis-gen@2508201
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---------

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>
Co-authored-by: Santiago Quiroga <22756465+quirogas@users.noreply.github.com>
Co-authored-by: Gabe Pearhill <86282859+pearigee@users.noreply.github.com>

Author: 3 people

packages/google-cloud-dataplex/README.md

@@ -1,4 +1,4 @@
-// Copyright 2025 Google LLC
+// Copyright 2026 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.