chore(deps): bump github.com/modelcontextprotocol/go-sdk from 1.4.1 to 1.6.1 #202

	# Purpose: verify the Python sin-code-bundle package on PRs by installing the
	# local source and running pytest + the audit-chain integrity check.
	# n8n-delegated per mandate M1 (see AGENTS.md §M1).
	# Heavy work (pip install, go build, pytest, audit chain) runs on the OCI
	# free-tier VM via n8n. The only runner-side work is a lightweight `go vet`
	# pre-check (~2s).
	name: sin-verify

	on:
	pull_request:
	branches: ["main"]
	workflow_dispatch:

	jobs:
	delegate:
	name: Delegate sin-verify to n8n
	runs-on: ubuntu-latest
	timeout-minutes: 2
	steps:
	- uses: actions/checkout@v4
	- uses: actions/setup-go@v5
	with:
	go-version-file: go.mod
	- name: Trigger n8n webhook
	env:
	N8N_CI_WEBHOOK_URL: ${{ secrets.N8N_CI_WEBHOOK_URL }}
	run: \|
	if [[ -z "$N8N_CI_WEBHOOK_URL" ]]; then
	echo "::error::N8N_CI_WEBHOOK_URL secret is not configured"
	exit 1
	fi
	curl -fsS -X POST \
	-H "Content-Type: application/json" \
	-d "{\"workflow\":\"sin-verify\",\"ref\":\"${{ github.ref }}\",\"sha\":\"${{ github.sha }}\",\"repo\":\"${{ github.repository }}\",\"actor\":\"${{ github.actor }}\"}" \
	"$N8N_CI_WEBHOOK_URL"
	- name: Local pre-check (go vet)
	run: \|
	go version
	go vet ./cmd/sin-code/...
	echo "Heavy Python verify work delegated to n8n."

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