[dependabot:release-train-updater] Review bundle: dependency patch bump for github/gh-aw-mcpg (pflag, grpc)

A review-mode dependency maintenance pass produced a ready-to-review bundle for target repository `github/gh-aw-mcpg` (not created directly there, per review-mode routing rules).

**Summary:** Bump two indirect Go module dependencies to their latest patch releases:
- `github.com/spf13/pflag` v1.0.9 → v1.0.10 (transitive via spf13/cobra)
- `google.golang.org/grpc` v1.83.1 → v1.83.2 (transitive via OTel OTLP gRPC exporter)

No security advisories were found for the repo's direct dependencies. All other direct/indirect modules were already current per `go list -u -m all`. This is a low-risk, patch-only, transitive-only bundle.

**Action:** A maintainer with write access to `github/gh-aw-mcpg` should review the published review-bundle artifact (`gh-aw-mcpg-transitive-patch`, requested output: create-pull-request, base: main@238ee8a) from this workflow run and, if it looks good, open the corresponding PR in that repository directly (this control-plane repo cannot push to it in review mode). Acceptance check: `go build ./...`, `go vet ./...`, and `go test ./internal/...` all pass on the bundled go.mod/go.sum diff.

Validation performed

- `go build ./...` → OK
- `go vet ./...` → OK
- `go build -o awmg .` → OK
- `go test ./internal/...` → all packages passed
- `go test ./test/integration/...` → pre-existing failures unrelated to this change (tests require a prebuilt `awmg` binary via `make build`; identical failure mode with and without the dependency bump)
- Dependency vulnerability check via GitHub Security Advisory DB on 5 direct dependencies → 0 vulnerable

Changed files (in bundle)

```
go.mod | 4 ++--
go.sum | 7 ++++---
2 files changed, 6 insertions(+), 5 deletions(-)
```

Smart-Dependabot-Merge-Candidate: yes

### Control Plane
- Correlation ID: `33867440259-38`
- Central repo: `githubnext/gh-aw-cao`
- Run URL: https://github.com/githubnext/gh-aw-cao/actions/runs/33867440259
- Target repository (untrusted reference, not linked): `github/gh-aw-mcpg`

> Generated by [:dependabot: Dependabot / Release Trains](https://github.com/githubnext/gh-aw-cao/actions/runs/33867878617) · copilot · auto · 64.6 AIC · ⌖ 7.44 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, 11:39 AM UTC

Review the published gh-aw-mcpg-transitive-patch artifact from the linked workflow run, focusing on the bundled go.mod and go.sum changes. Confirm the pflag and grpc patch versions, then run go build ./..., go vet ./..., and go test ./internal/.... Done means opening the corresponding PR in github/gh-aw-mcpg with those checks passing; the issue notes that this control-plane repository cannot create it directly.

Written by the indexing model from the issue text.