fix(batch): panic recovery, deadlock-safe error sends, bounded prealloc, Done() race#65

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MasterOfBinary wants to merge 14 commits into

fix/engine-hardening

Commits on May 29, 2026

fix(batch): bound batch pre-allocation capacity

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fix(batch): make internal error sends respect context cancellation

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fix(batch): recover panics from user processors

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fix(batch): stop leaking timers in waitForItems

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fix(batch): guard Done() read of b.done with the mutex

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test(batch): cover double-Go panic and SourceError message

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test(batch): fix misleading comment, assert which item IDs fail

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docs(batch): document errors.As pointer-target form for error types

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fix(batch): defer proactive stop-on-cancel to WithCancelMode

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test(batch): adapt hardening tests to single-use Go signature

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