Respect abort signals in asset preprocessing worker

[MohamedBassem]

Summary

• ensure the asset preprocessing worker's OCR and PDF text extraction honor abort signals
• make PDF screenshot generation abortable and propagate abort errors instead of swallowing them
• guard the worker loop with abort checks before intensive operations

Testing

• pnpm --filter @karakeep/workers typecheck

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Codex Task

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📥 Commits

Reviewing files that changed from the base of the PR and between 6821257 and 31636d9.

📒 Files selected for processing (1)

• apps/workers/workers/assetPreprocessingWorker.ts (14 hunks)

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[chatgpt-codex-connector]

Prevent abort race from causing unhandled rejection

In readImageText the abort handling races worker.recognize against abortPromise, but the abort promise is left pending when OCR wins the race. If the job’s abort signal fires later (e.g., the queue timeout or a manual cancellation after OCR completed), that pending promise will reject with no catch handler, producing an unhandled rejection and potentially taking down the worker process under Node’s default unhandledRejection behavior; the same pattern also exists in the PDF screenshot race. The abort promise needs to be cancelled or observed so late aborts don’t crash the worker.

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