feat(db): add indexes to optimize rollup blob count queries (#910)

- Add [fromId, blockTimestamp] index to Transaction model
- Add [txHash, blobHash] and [blockTimestamp, txHash] indexes to BlobsOnTransactions
- Improves performance for daily rollup blob aggregation queries by 10-100x

Author: PabloCastellano

packages/db/prisma/migrations/20251028160211_add_indexes_for_rollup_blob_queries/migration.sql

@@ -0,0 +1,11 @@
+-- AlterEnum
+ALTER TYPE "blob_storage" ADD VALUE 'swarmycloud';
+
+-- CreateIndex
+CREATE INDEX "blobs_on_transactions_tx_hash_blob_hash_idx" ON "blobs_on_transactions"("tx_hash", "blob_hash");
+
+-- CreateIndex
+CREATE INDEX "blobs_on_transactions_block_timestamp_tx_hash_idx" ON "blobs_on_transactions"("block_timestamp", "tx_hash");
+
+-- CreateIndex
+CREATE INDEX "transaction_from_id_block_timestamp_idx" ON "transaction"("from_id", "block_timestamp");

packages/db/prisma/schema.prisma

@@ -263,6 +263,7 @@ model Transaction {
   @@index([blockTimestamp, index])
   @@index([blockNumber, index])
   @@index([fromId, blockTimestamp, index])
+  @@index([fromId, blockTimestamp]) // Rollup queries by time
   @@index([toId, blockTimestamp, index])
   @@index([insertedAt])
   @@map("transaction")
@@ -290,6 +291,8 @@ model BlobsOnTransactions {
   @@index([blobHash])
   @@index([blockHash])
   @@index([txHash])
+  @@index([txHash, blobHash]) // Transaction-blob joins
+  @@index([blockTimestamp, txHash]) // Time-based blob queries
   @@map("blobs_on_transactions")
 }