fix(delegation): clean delegations on user deletion

[hamza221]

🤖 AI (if applicable)

• The content of this PR was partly or fully generated using AI

[hamza221]

/backport to stable5.10

[ChristophWurst]

not covered by any test

[hamza221]

Should I write integration tests for the mapper ?

[ChristophWurst]

yes

[coderabbitai]

📝 Walkthrough

Walkthrough

DelegationMapper gains a new deleteByUserId(string $userId): void method that issues a DELETE query filtered by user_id. UserDeletedListener is updated to import and inject DelegationMapper, then calls deleteByUserId inside handle() alongside the existing account and text-block deletions. A new DelegationMapperTest integration test class covers delegation lookup, owner resolution, missing-record exceptions, and the new deletion method. UserDeletedListenerTest is updated to mock DelegationMapper and assert the new call in all existing test scenarios.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 4.55% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately describes the main change: adding delegation cleanup to user deletion, which is the core objective of the PR.
Description check	✅ Passed	The description is minimal but not completely off-topic; it contains a standard AI usage checkbox, which is tangentially related to PR documentation conventions.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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[coderabbitai]

Actionable comments posted: 2

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: f1fd5a32-4eb1-4b35-94b7-e195ef5ef64a

📥 Commits

Reviewing files that changed from the base of the PR and between e988c74 and b06d3e9.

📒 Files selected for processing (4)

• lib/Db/DelegationMapper.php
• lib/Listener/UserDeletedListener.php
• tests/Integration/Db/DelegationMapperTest.php
• tests/Unit/Listener/UserDeletedListenerTest.php

[ChristophWurst]

/backport to stable5.10 please