[WIP] Update google.golang.org/grpc from v1.75.0 to v1.79.1

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This section details on the original issue you should resolve

<issue_title>[deps] Update google.golang.org/grpc from v1.75.0 to v1.79.1</issue_title>
<issue_description>## Summary
Update the indirect dependency google.golang.org/grpc from v1.75.0 to v1.79.1. This is the gRPC framework used by Google Cloud and other services.

Current State

• Package: google.golang.org/grpc
• Current Version: v1.75.0
• Proposed Version: v1.79.1
• Dependency Type: Indirect (// indirect in go.mod)
• Update Type: Multi-version minor jump (v1.75.0 → v1.79.1, skips v1.76.x, v1.77.x, v1.78.x)

Why Separate Issue

⚠️ Multi-version minor jump with potential behavior changes

• Jumps 4 minor versions (v1.75.0 → v1.79.1)
• v1.79.1 includes a bug fix removing -dev suffix from User-Agent header
• Multiple intermediate releases may include new features, API changes, or behavior modifications
• gRPC changes can affect Google Cloud API communication and MCP server interactions

Safety Assessment

⚠️ Requires careful review

• Major jump across 4 minor versions
• User-Agent header change in v1.79.1 (removed -dev suffix) — could affect server-side filtering
• Review all intermediate changelogs: v1.76.x, v1.77.x, v1.78.x
• Test all Google Cloud API interactions (genai, cloud.google.com/go)
• Verify MCP server communication is unaffected

Changes (v1.79.1)

• Bug fix: Removed the -dev suffix from the User-Agent header (could affect server-side behavior)

Links

• v1.79.1 Release Notes
• Package Repository
• [Go Package]((pkg.go.dev/redacted)

Recommended Action

go get google.golang.org/grpc@v1.79.1
go mod tidy

Testing Notes

• Run all tests: make test-unit
• Test Google Cloud API integrations (Gemini/genai engine)
• Verify gRPC-based MCP server connections still work
• Check for any server-side compatibility issues with updated User-Agent
• Test end-to-end with Google engine workflows

Generated by Dependabot Dependency Checker

• expires on Feb 25, 2026, 9:28 AM UTC

Comments on the Issue (you are @copilot in this section)

• Fixes [deps] Update google.golang.org/grpc from v1.75.0 to v1.79.1 #17873

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