chore(deps): bump google.golang.org/genai from 1.56.0 to 1.57.0

Bumps [google.golang.org/genai](https://github.com/googleapis/go-genai) from 1.56.0 to 1.57.0.
- [Release notes](https://github.com/googleapis/go-genai/releases)
- [Changelog](https://github.com/googleapis/go-genai/blob/main/CHANGELOG.md)
- [Commits](googleapis/go-genai@v1.56.0...v1.57.0)

---
updated-dependencies:
- dependency-name: google.golang.org/genai
  dependency-version: 1.57.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

go.mod

@@ -89,7 +89,7 @@ require (
 	golang.org/x/oauth2 v0.36.0
 	golang.org/x/text v0.37.0
 	google.golang.org/api v0.278.0
-	google.golang.org/genai v1.56.0
+	google.golang.org/genai v1.57.0
 	google.golang.org/grpc v1.81.0
 	google.golang.org/protobuf v1.36.12-0.20260120151049-f2248ac996af
 	gopkg.in/gomail.v2 v2.0.0-20160411212932-81ebce5c23df

go.sum

@@ -825,8 +825,8 @@ gonum.org/v1/gonum v0.17.0 h1:VbpOemQlsSMrYmn7T2OUvQ4dqxQXU+ouZFQsZOx50z4=
 gonum.org/v1/gonum v0.17.0/go.mod h1:El3tOrEuMpv2UdMrbNlKEh9vd86bmQ6vqIcDwxEOc1E=
 google.golang.org/api v0.278.0 h1:W7jiRvRi53VYFfZ/HoZjQBtJk7gOFbHD8ot1RzVZU6E=
 google.golang.org/api v0.278.0/go.mod h1:B9TqLBwJqVjp1mtt7WeoQwWRwvu/400y5lETOql+giQ=
-google.golang.org/genai v1.56.0 h1:IwWrg1K0cn1/WBiPno/dYr0Q6o75NeH/bh3G4JEFERE=
-google.golang.org/genai v1.56.0/go.mod h1:A3kkl0nyBjyFlNjgxIwKq70julKbIxpSxqKO5gw/gmk=
+google.golang.org/genai v1.57.0 h1:qTyG2ynz5dQy2jF4CvZdLHHVslhR0heMue+zM1a4GNM=
+google.golang.org/genai v1.57.0/go.mod h1:A3kkl0nyBjyFlNjgxIwKq70julKbIxpSxqKO5gw/gmk=
 google.golang.org/genproto v0.0.0-20260504160031-60b97b32f348 h1:JjVGDZYWkJWZcxveJGzfkXC5myDVWAd4dZdgbzrDUv8=
 google.golang.org/genproto v0.0.0-20260504160031-60b97b32f348/go.mod h1:95PqD4xM+AdOcBGsmgfaofXsiA37uXDtDufVbntT3TU=
 google.golang.org/genproto/googleapis/api v0.0.0-20260504160031-60b97b32f348 h1:U8orV30l6KpDsi9dxU0CoJZGbjS8EEpw+6ba+XwGPQA=