Stop toasting when the consensus-checklist creation race is lost

[InfinityBowman]

Closes #844

Problem

Two reviewers opening the same reconciliation at once both create the consensus checklist. The loser's checklist.create is rejected as DuplicateChecklist, which rolls the optimistic row back, so the unconditional follow-up checklist.update (status reconciling, title) is rejected as NotFound. The pool toasted both. The page already adopts the winner through its race-recovery effect, so both toasts were noise and the second was wrong.

Change

• checklist.create with kind: 'consensus' now creates the row already reconciling and titled "Reconciled Checklist". A consensus checklist only exists to be reconciled, so the follow-up update is gone along with the NotFound rejection.
• ReconciliationWrapper no longer issues that update after the create.
• ConnectionPool still logs the rejection but skips the toast for a consensus create rejected as DuplicateChecklist. Reviewer-kind duplicates from the To-Do tab still toast.
• Shared test asserting a consensus create lands reconciling with the title.

The seed and templates path already sends a checklist.update after creating consensus rows, which remains valid.

Verification

• pnpm --filter @corates/shared test: 333 passed
• pnpm --filter web test (localCollections, reconcile): 324 passed
• pnpm typecheck, pnpm lint: clean

https://claude.ai/code/session_01TAEtViwHmBCJSDSVKkzTD6

Summary by CodeRabbit

• Bug Fixes
  • Consensus checklists now start directly in reconciliation with the “Reconciled Checklist” title.
  • Prevented a race condition that could trigger duplicate-creation errors during reconciliation.
  • Suppressed misleading error notifications when duplicate consensus creation results from this expected race.
  • Reconciliation progress is now preserved without requiring an immediate follow-up update.

[coderabbitai]

Note

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⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Advanced

Run ID: 1b5b01cc-e172-4e94-b184-39e0cadeae4a

📥 Commits

Reviewing files that changed from the base of the PR and between 4776e3b and c39688b.

📒 Files selected for processing (4)

• packages/shared/src/sync/__tests__/checklists.test.ts
• packages/shared/src/sync/mutators.ts
• packages/web/src/components/project/reconcile-tab/ReconciliationWrapper.tsx
• packages/web/src/project/ConnectionPool.ts

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