[maintainer] Pool liquidity + TAO in/out flow ingestion for subnet economics

[JSONbored]

24h volume, pool liquidity (alpha+TAO reserves) and TAO in/out flow require pool-state ingestion the explorer does not have — the economics tier carries only alpha_price_tao/total_stake_tao and a subnet_volume_tao passthrough. GraphQL already declares alpha_in_pool/alpha_out_pool fields with no backing indexer. New indexer work tied to the deep-history infra decision (ADR 0013), so maintainer-only.

Deliverables

• Design pool-state ingestion (alpha_in_pool / alpha_out_pool reserves + TAO flow) and reconcile with the existing GraphQL fields that are declared but unbacked
• Add schema + a cron/indexer path to populate pool reserves and net TAO flow per subnet
• Expose pool liquidity + TAO in/out flow in the economics artifact + contracts + OpenAPI, then wire display tiles
• Resolve the infra dependency (ADR 0013 hybrid deploy / deep-history) before scoping downstream bounties

References

• repo/src/graphql.mjs:146 (alpha_in_pool / alpha_out_pool declared, unbacked)
• repo/src/health-serving.mjs:1017 (economics row - no pool/flow fields)
• assessment/featureGaps.md P3 (pool-liquidity/TAO-flow = maintainer)

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size: M · maintainer-only (owner)

[linear-code]

JSO-2090