feat: index assets contracts (FuelLabs#576)

packages/graphql/database/migrations/db/migrate.ts

@@ -0,0 +1,41 @@
+import { DatabaseConnection } from '../../../src/infra/database/DatabaseConnection';
+
+async function migrate() {
+  const db = DatabaseConnection.getInstance();
+
+  await db.query(
+    `
+    DROP TABLE IF EXISTS indexer.block_statistics;
+    `,
+    [],
+  );
+  console.log('Dropped block_statistics table if it existed.');
+  // Step 3: Create the blocks table
+  await db.query(
+    `
+    CREATE TABLE indexer.block_statistics (
+        id SERIAL PRIMARY KEY,
+        timestamp TIMESTAMP NOT NULL,
+        number_of_blocks INTEGER NOT NULL,
+        cumulative_block_reward NUMERIC NOT NULL,
+        start_block INTEGER NOT NULL,
+        end_block INTEGER NOT NULL
+    );
+    `,
+    [],
+  );
+
+  // Step 16: Create indexes for transactions_accounts table
+  await db.query(
+    `
+    CREATE UNIQUE INDEX ON indexer.block_statistics(id);
+    CREATE INDEX ON indexer.block_statistics(timestamp);
+    `,
+    [],
+  );
+  console.log('Indexes for transactions_accounts table created successfully.');
+}
+
+migrate()
+  .catch(console.error)
+  .finally(() => process.exit());