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Inventories unused code paths discovered during data fix sprint: csv_ops.rs (entire module), process_wal_dump, apply_ops_batch_dump. Documents the actual production dump flow vs the dead WAL-based path. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Added findings from 3 parallel scouts: - 5 dead modules (field_handler, preset, shard_store_migrate/doc, csv_ops) - 10 dead parse functions in copy_queries.rs - 3 dead functions in loader.rs - Nearly-dead backfill subsystem and Ingester wrapper - Estimated ~2-3K lines removable - Confirmed bitmap_fs.rs and unified_cache.rs are LIVE (not dead) Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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Summary
Do not merge urgently — this is a handoff doc for future cleanup work.
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