fix(tests): update database connection strings for CI

* Use dynamic host and port for Postgres in tests
* Add helper functions for test database host and port

tests/integration/workflow_test.go

@@ -3,6 +3,7 @@ package integration
 import (
 	"context"
 	"database/sql"
+	"fmt"
 	"log/slog"
 	"testing"
 	"time"
@@ -27,7 +28,7 @@ func TestBrokerWorkflow(t *testing.T) {
 	ctx := context.Background()
 
 	// Database connection string
-	connStr := "user=user password=password dbname=broker_test host=127.0.0.1 port=5433 sslmode=disable"
+	connStr := fmt.Sprintf("user=user password=password dbname=broker_test host=%s port=%d sslmode=disable", testDBHost(), testDBPort())
 
 	// Connect to database with retry logic
 	db, err := connectWithRetry(connStr, 10, 2*time.Second)
@@ -43,8 +44,8 @@ func TestBrokerWorkflow(t *testing.T) {
 
 	// Create database adapter
 	postgresConfig := adapter.PostgresConfig{
-		Host:            "127.0.0.1",
-		Port:            5433,
+		Host:            testDBHost(),
+		Port:            testDBPort(),
 		Database:        "broker_test",
 		User:            "user",
 		Password:        "password",
@@ -78,8 +79,8 @@ func TestBrokerWorkflow(t *testing.T) {
 		Databases: []config.DatabaseConfig{
 			{
 				Name:       "test_db",
-				Host:       "127.0.0.1",
-				Port:       5433,
+				Host:       testDBHost(),
+				Port:       testDBPort(),
 				Database:   "broker_test",
 				User:       "user",
 				Password:   "password",