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

@@ -15,7 +15,7 @@ require (
 	github.com/plexusone/phoenix-go v0.2.0
 	github.com/plexusone/vaultguard v0.3.0
 	google.golang.org/adk v1.2.0
-	google.golang.org/genai v1.56.0
+	google.golang.org/genai v1.57.0
 	gopkg.in/yaml.v3 v3.0.1
 )
 

go.sum

@@ -344,8 +344,8 @@ google.golang.org/adk v1.2.0 h1:MfQD1/GqPfIsFNBcozNykkjdqNIdCrPH/SNqKPZF/yM=
 google.golang.org/adk v1.2.0/go.mod h1:6QY5jQI7awU4WYtJqvyIkJQheCvqsGWweU6BX63USEc=
 google.golang.org/api v0.277.0 h1:HJfyJUiNeBBUMai7ez8u14wkp/gH/I4wpGbbO9o+cSk=
 google.golang.org/api v0.277.0/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 v0.0.0-20260427160629-7cedc36a6bc4 h1:2iMJZntwvmfgtse+s744JY7v7PgEdSBuFYXucvpOHNM=
 google.golang.org/genproto v0.0.0-20260427160629-7cedc36a6bc4/go.mod h1:v14kaaboYyXQ1Gsu489Q+Hg/oN4B33mWtuOhF1HCeXA=
 google.golang.org/genproto/googleapis/api v0.0.0-20260427160629-7cedc36a6bc4 h1:yOzSCGPx+cp5VO7IxvZ9SBFF7j1tZVcNtlHR2iYKtVo=