fix(server): skip native sessions during bulk import

[maria-rcks]

bulk import could publish a second thread for a claude or codex session already owned by t3, including archived and deleted originals. the v2 event sink now rechecks ownership in the same provider instance inside the publication transaction. owned sessions create no history or new runtime row and count as neither imported nor failed, so onboarding keeps the selected landing project without a false import warning. ordinary imports and retries recover resume metadata without replaying history; genuine scan and write failures still count as skipped.

rebuilds the ownership and retry guarantees from #10950 for v2. existing duplicates and cross-environment deduplication remain outside this fix.

blacksmith verification: 169 tests passed (162 importer/scanner/foundation tests and 7 welcome-wizard tests); scoped lint and formatting passed; server and web typechecks passed. ownership counting regressions reproduced 24 failures before the fix. real provider transcript import, onboarding, and ui evidence remain unverified and parent-owned. final reviews for the updated head are pending.

Closes #10933

model: unknown-model, codex harness in t3 code.

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📥 Commits

Reviewing files that changed from the base of the PR and between 4ee6bfd and 2744869.

📒 Files selected for processing (4)

• apps/server/src/orchestration-v2/EventSink.ts
• apps/server/src/project/AgentSessionImporter.test.ts
• apps/server/src/project/AgentSessionImporter.ts
• apps/web/src/components/onboarding/WelcomeWizard.test.tsx

• Autopilot · Keep fixing CodeRabbit findings and required CI, and resolving merge conflicts

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[macroscopeapp]

Approvability

Verdict: Not approved

Macroscope's review found this PR not approvable — This PR changes the production bulk-import pipeline to conditionally suppress an entire native session, including its history and runtime setup, using a new transaction-time ownership check in shared event infrastructure. The behavior is well tested, but its cross-component gating and persistence-order changes warrant human review.

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Dismissing prior approval to re-evaluate 2744869