test: add dual domain support to integration and service tests

  Update integration tests, TAP agent tests, and service router tests
  to support V1/V2 dual domain architecture. Ensures comprehensive
  testing coverage for both protocol versions.

Author: neithanmo

crates/service/tests/router_test.rs

@@ -66,6 +66,7 @@ async fn full_integration_test() {
     let router = ServiceRouter::builder()
         .database(database)
         .domain_separator(TAP_EIP712_DOMAIN.clone())
+        .domain_separator_v2(test_assets::TAP_EIP712_DOMAIN_V2.clone())
         .http_client(http_client)
         .graph_node(GraphNodeConfig {
             query_url: graph_node_url.clone(),

crates/tap-agent/tests/tap_agent_test.rs

@@ -25,7 +25,7 @@ use sqlx::PgPool;
 use test_assets::{
     assert_while_retry, flush_messages, ALLOCATION_ID_0, ALLOCATION_ID_1, ALLOCATION_ID_2,
     ESCROW_ACCOUNTS_BALANCES, ESCROW_ACCOUNTS_SENDERS_TO_SIGNERS, INDEXER_ADDRESS,
-    INDEXER_ALLOCATIONS, TAP_EIP712_DOMAIN, TAP_SENDER, TAP_SIGNER,
+    INDEXER_ALLOCATIONS, TAP_EIP712_DOMAIN, TAP_EIP712_DOMAIN_V2, TAP_SENDER, TAP_SIGNER,
 };
 use thegraph_core::alloy::primitives::Address;
 use tokio::sync::{mpsc, watch};
@@ -98,6 +98,7 @@ pub async fn start_agent(
     let args = SenderAccountsManagerArgs {
         config,
         domain_separator: TAP_EIP712_DOMAIN.clone(),
+        domain_separator_v2: TAP_EIP712_DOMAIN_V2.clone(),
         pgpool,
         indexer_allocations: indexer_allocations1,
         escrow_accounts_v1: escrow_accounts.clone(),