docs: document G14 manual polling trigger

scripts/g14-gitops-render.mjs

@@ -961,6 +961,7 @@ This directory is generated from \`CI.json\`, \`deploy/deploy.json\`, and \`depl
 - Branch split: source branch \`${args.sourceBranch}\` remains the watched code branch; generated desired state is promoted to \`${args.gitopsBranch}\`.
 - CD: Argo CD Application \`argocd/hwlab-g14-dev\` consumes \`${args.gitopsBranch}:deploy/gitops/g14/runtime\`.
 - Public preview: FRP exposes only G14 web \`${args.webEndpoint}\` and edge/API \`${args.runtimeEndpoint}\` through \`hwlab-g14-frpc\`; D601 keeps \`:16666/:16667\`.
+- Manual polling: run \`kubectl -n hwlab-ci create job --from=cronjob/hwlab-g14-branch-poller hwlab-g14-branch-poller-manual-$(date -u +%Y%m%d%H%M%S)\`; this reuses the same poller path and creates a commit-pinned Tekton PipelineRun only when needed.
 - D601 boundary: this path does not target D601, does not use UniDesk Code Queue, and does not change D601 production traffic.
 - Concurrency: CI builds are per source commit and do not acquire the legacy DEV CD Lease; Argo CD reconciles the Git desired state.
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