core: delete old session after recreate

[renbaoshuo]

Summary by CodeRabbit

• Bug Fixes
  • Improved session management to properly clean up old session tokens when sessions are recreated, preventing orphaned session records from accumulating.

[coderabbitai]

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ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: e468b1e1-f392-445e-a9dc-2182a8fd434b

📥 Commits

Reviewing files that changed from the base of the PR and between 3cc1325 and 8450390.

📒 Files selected for processing (1)

• packages/hydrooj/src/service/layers/base.ts

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Walkthrough

This PR adds a single cleanup operation to the session layer's recreation path. When a session is being recreated, the code now explicitly deletes the existing session token before assigning new session metadata and creating a fresh token. This prevents leaving an orphaned session record in the token store during the recreation process.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title 'core: delete old session after recreate' accurately summarizes the main change: deleting an old session token during the session recreation process.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
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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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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packages/hydrooj/src/service/layers/base.ts

ESLint skipped: missing config or dependency (missing-dependency). The ESLint configuration references a package that is not available in the sandbox.

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