test: run T2571 recent-list case serially

[nichenqin]

Problem

The lab runs cases with it.concurrent (default width 2), but T2571 asserts user-global state: immediately after duplicate, the copy is the first item in the current user's recent-base list.

Run https://github.com/teableio/teable-e2e-lab/actions/runs/33042773544 failed because a concurrent field case visited bsen0JTflQxwELN3sCN after the duplicate and correctly moved it ahead of the copy. This does not reproduce T2571; per-case bases isolate data, not the shared user's recent history.

Change

• Add optional serial case metadata.
• Register serial cases with normal it while all others remain it.concurrent.
• Mark only base-share/a-duplicated-base-in-the-recent-list serial.

Verification

• pnpm check passes.
• TypeScript validates all 259 files.
• No product query/ordering change: a genuinely later user visit must remain ahead of the duplicated base.

Related teable-ee PR: https://github.com/teableio/teable-ee/pull/3194

[CLAassistant]

All committers have signed the CLA.

[nichenqin]

recheck