import { Knex } from "knex";
/**
 * Rebuilds `sdk_cache` for per-entity last-content dedupe.
 *
 * The original table keyed rows by (type, content-hash) as insert-only set
 * membership: "have we ever sent this exact content within the TTL window?".
 * That cannot express a value returning to a previously-seen state (A -> B -> A),
 * so a corrective write whose content matches an earlier one is silently deduped.
 *
 * The new shape stores one row per (type, entity_key) holding that entity's last
 * content hash, so dedupe becomes "does this differ from what we last sent for
 * this entity?". The SDK cache is ephemeral (rebuilt from migrations on each
 * container start), so there is no data to preserve — we drop and recreate.
 */
export declare function up(knex: Knex): Promise<void>;
export declare function down(knex: Knex): Promise<void>;
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