[BUGFIX] Fix findBySearchTermInBackendMode() with Postgres

[oliverklee]

With Postgres, we cannot use LIKE for integer fields.

Fixes #976

[coveralls]

Coverage Report for CI Build 25181083397

Coverage remained the same at 100.0%

Details

• Coverage remained the same as the base build.
• Patch coverage: 7 of 7 lines across 1 file are fully covered (100%).
• No coverage regressions found.

Uncovered Changes

No uncovered changes found.

Coverage Regressions

No coverage regressions found.

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Coverage Stats

Relevant Lines:	234
Covered Lines:	234
Line Coverage:	100.0%
Coverage Strength:	6.02 hits per line

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💛 - Coveralls

[Copilot]

Pull request overview

Fixes a Postgres-specific failure in FrontendUserRepository::findBySearchTermInBackendMode() by avoiding LIKE/string comparisons against the integer uid field.

Changes:

• Introduce a SEARCH_FIELDS constant to centralize the list of text fields searched via LIKE.
• Only add the uid equality constraint when the search term is purely numeric (preventing Postgres integer-cast errors).
• Add a changelog entry documenting the fix.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
Classes/Domain/Repository/FrontendUserRepository.php	Prevents invalid integer comparisons on Postgres by conditionally adding the uid matcher and refactoring LIKE matchers into a field list.
CHANGELOG.md	Documents the Postgres fix in the “Fixed” section.

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