feat(apollo-forest-run): auto eviction per partition

[vladar]

Overview

Add per-partition auto eviction to ForestRun.

Details

• Add per-partition autoEvict option to PartitionConfig — when enabled, evicts oldest operations in the partition automatically on writes to that partition
• Refactor eviction internals: extract groupByPartition, unify evictOldData to accept pre-grouped ops, consolidate all auto eviction logic into maybeAutoEvict

How it works

Each partition in unstable_partitionConfig.partitions can now set autoEvict: true. When a write lands in such a partition,
maybeAutoEvict detects the affected partition from the transaction changelog, groups operations by partition (single pass), applies a 2x threshold check, and calls evictOldData with the filtered map. Non-partitioned writes still use the global autoEvict + maxOperationCount path.

[github-actions]

📊 Benchmark Analysis Report

✅ No significant performance changes detected

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Threshold: 5% change

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Updated: 2026-03-24T18:29:04.957Z