Fix Firefox test timeouts in DbWorker leader election tests

[Copilot]

Firefox's WASM SQLite initialization takes >500ms, causing waitForLeader to timeout before receiving LeaderAcquired messages from DbWorker.

Changes

• Increased waitForLeader timeout from 500ms to 2000ms in packages/web/test/DbWorker.test.ts

Affected Tests

Fixes 6 Firefox test failures:

• same dbName can initialize from multiple ports without blocking
• releases stale leader when no heartbeat arrives
• keeps leader alive when heartbeats are delivered

const waitForLeader = (
  port: MessagePort<DbWorkerLeaderInput, DbWorkerLeaderOutput>,
  timeoutMs = 2_000,  // was 500
): Promise<DbWorkerLeaderOutput | null> => ...

---

✨ Let Copilot coding agent set things up for you — coding agent works faster and does higher quality work when set up for your repo.

[coderabbitai]

Important

Review skipped

Bot user detected.

To trigger a single review, invoke the @coderabbitai review command.

You can disable this status message by setting the reviews.review_status to false in the CodeRabbit configuration file.

Use the checkbox below for a quick retry:

• 🔍 Trigger review

---

_{Comment @coderabbitai help to get the list of available commands and usage tips.}