Some DTO Attributes Fixes

[idseefeld]

This is another PR for issue #21675.
For DTOs without autoIncrement columns and multi-column primary keys attributes need updates to be fully compatible with NPoco. Especially an PostgreSQL provider has otherwise issues.

The created table sql stays unchanged!

All test must succeed and must not be any changes for existing database providers.

[github-actions]

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[Copilot]

Pull request overview

This PR aims to improve NPoco compatibility for several persistence DTOs (especially composite-key / non-autoincrement scenarios) and to avoid case-sensitive SQL issues (e.g., PostgreSQL) by relying on DTO column name constants in delete clauses.

Changes:

• Updated repository delete clauses to use DTO column-name constants instead of hard-coded strings.
• Adjusted multiple DTOs’ primary key / table metadata (adding [PrimaryKey], introducing constants, updating PK column references for deletes).
• Refactored some DTO constants to differentiate between key columns vs. other identifiers.

Reviewed changes

Copilot reviewed 20 out of 20 changed files in this pull request and generated 16 comments.

Show a summary per file

File	Description
src/Umbraco.Infrastructure/Persistence/Repositories/Implement/MemberRepository.cs	Uses DTO column constant for nodeId delete clause to improve provider compatibility.
src/Umbraco.Infrastructure/Persistence/Repositories/Implement/ContentTypeRepositoryBase.cs	Updates delete clauses to target the correct key columns after DTO constant refactors.
src/Umbraco.Infrastructure/Persistence/Repositories/Implement/ContentTypeRepository.cs	Updates delete clauses to use updated DTO key column constants.
src/Umbraco.Infrastructure/Persistence/Dtos/Webhook2HeadersDto.cs	Adds class-level PK metadata and refactors PK naming/constants.
src/Umbraco.Infrastructure/Persistence/Dtos/Webhook2EventsDto.cs	Adds class-level PK metadata and refactors PK naming/constants.
src/Umbraco.Infrastructure/Persistence/Dtos/Webhook2ContentTypeKeysDto.cs	Adds class-level PK metadata and refactors PK naming/constants.
src/Umbraco.Infrastructure/Persistence/Dtos/UserGroup2NodePermissionDto.cs	Adds class-level PK metadata and refactors PK naming/constants for composite PK.
src/Umbraco.Infrastructure/Persistence/Dtos/UserGroup2NodeDto.cs	Adds class-level PK metadata and refactors PK naming/constants for composite PK.
src/Umbraco.Infrastructure/Persistence/Dtos/UserGroup2LanguageDto.cs	Adds class-level PK metadata and refactors PK naming/constants for composite PK.
src/Umbraco.Infrastructure/Persistence/Dtos/UserGroup2AppDto.cs	Refactors constants so PK constraint name and key columns are clearer (but see review comments).
src/Umbraco.Infrastructure/Persistence/Dtos/User2UserGroupDto.cs	Adds class-level PK metadata and refactors PK naming/constants for composite PK.
src/Umbraco.Infrastructure/Persistence/Dtos/User2NodeNotifyDto.cs	Refactors constants for composite PK and updates repositories to use the correct column constants.
src/Umbraco.Infrastructure/Persistence/Dtos/User2ClientIdDto.cs	Refactors constants for composite PK and used by UserRepository insert/delete flows.
src/Umbraco.Infrastructure/Persistence/Dtos/TagRelationshipDto.cs	Refactors constants and index definition to reference the correct nodeId column constant.
src/Umbraco.Infrastructure/Persistence/Dtos/Member2MemberGroupDto.cs	Refactors constants for composite PK.
src/Umbraco.Infrastructure/Persistence/Dtos/ContentVersionCleanupPolicyDto.cs	Renames PK constant usage (column name) and aligns PK constraint naming.
src/Umbraco.Infrastructure/Persistence/Dtos/ContentTypeTemplateDto.cs	Refactors constants for composite PK and column naming.
src/Umbraco.Infrastructure/Persistence/Dtos/ContentTypeAllowedContentTypeDto.cs	Refactors PK-related constants and FK column references.
src/Umbraco.Infrastructure/Persistence/Dtos/ContentType2ContentTypeDto.cs	Refactors constants for composite PK and column naming.
src/Umbraco.Infrastructure/Persistence/Dtos/ContentNuDto.cs	Refactors composite PK metadata and FK/index column references.