Batch support: fix completion races, accounting, and API polish#3

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jpcamara wants to merge 22 commits into

batch-review-fixes

Commits on Jul 22, 2026

Fix batch completion races and accounting

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Capture batch membership at enqueue time

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Add batch execution foreign keys, drop unused active_job_batch_id

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Cover batch race, accounting and discard regressions

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Update batch docs to match implementation

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Restore active_job_batch_id as a reserved identifier

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Rework batch completion to stay lock-free on hot paths

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Sweep stalled batches from the dispatcher

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Increment batch counters before inserting executions

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Pin lock-free completion invariants with a race test

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Pin the remaining lock-free invariants with race tests

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Trim batch comments to match house style

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Share one maintenance timer between concurrency and batches

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Keep ConcurrencyMaintenance as a compatibility shim

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Commits on Jul 23, 2026