[dependabot:release-train-updater] Review bundle: patch bump google.golang.org/grpc v1.83.1→v1.83.2 in github/gh-aw-mcpg

A dependency release-train review bundle was prepared for target repository `github/gh-aw-mcpg` (review mode — no direct changes were made in that repository).

**Action:** Maintainer of `github/gh-aw-mcpg` should review the attached bundle artifact and, if satisfied, open a PR there applying the `go.mod`/`go.sum` diff.

## What changed
- Package: `google.golang.org/grpc` (indirect dependency, pulled in via the OTel OTLP HTTP trace exporter)
- Manifests: `go.mod`, `go.sum`
- Old version: v1.83.1 → New version: v1.83.2 (patch)
- Paired bump: `google.golang.org/genproto/googleapis/rpc` pseudo-version updated to match
- Update type: patch, routine freshness (no security advisory)

## Validation performed
- `go mod tidy`, `go build ./...`, `make build`, `go test ./...` (full unit + integration suite, including binary-based tests) — all passed
- `govulncheck ./...` — no vulnerabilities found before or after the bump

## Risk
- Low risk: transitive, patch-level, tracing/telemetry dependency chain only; no direct import of grpc in application source; no auth/crypto/payment/db code touched.

Full summary, patch diff, and validation logs

The complete bundle (summary.md, changes.patch, changed-files.txt, validation.txt) was published as a workflow artifact via `publish_review_bundle` (bundle: `grpc-patch-bump`).

### Control Plane
- Correlation ID: 33900274111-159
- Central repo: githubnext/gh-aw-cao
- Run URL: https://github.com/githubnext/gh-aw-cao/actions/runs/33900274111
- Target repository: `github/gh-aw-mcpg` (review mode)

> Generated by [:dependabot: Dependabot / Release Trains](https://github.com/githubnext/gh-aw-cao/actions/runs/33900274111) · copilot · auto · 54.5 AIC · ⌖ 11.5 AIC · ⊞ 20.5K · [◷](https://github.com/search?q=repo%3Agithubnext%2Fgh-aw-cao+is%3Aissue+%22gh-aw-workflow-call-id%3A+githubnext%2Fgh-aw-cao%2Fdependabot-release-train-updater%22&type=issues)
>

_{Add this agentic workflow to your repo}

To install this agentic workflow, run

```
gh aw add githubnext/gh-aw-cao/.github/workflows/dependabot-release-train-updater.md@main
```

> - [x] expires on Sep 18, 2026, 5:35 PM UTC

Start with the published grpc-patch-bump bundle, reading summary.md, changes.patch, and validation.txt for the go.mod and go.sum update. Review the transitive grpc and genproto version changes in github/gh-aw-mcpg, then run the listed Go validation commands if needed. Done means opening the reviewed dependency-update PR in the target repository.

Written by the indexing model from the issue text.