[codex] teach orchestrator status command guidance

[cneuralnetwork]

Summary

Teach orchestrator sessions the existing worker status commands instead of leaving them to guess. The standing orchestrator prompt now points to ao session ls, ao session get <worker-session-id>, and ao --help as the fallback before inventing commands.

Why

The prompt previously listed ao spawn and ao send, then told the orchestrator to track worker progress without naming the real inspection commands. That made orchestrators try nonexistent commands such as ao list or ao status --session before eventually discovering help.

Changes

• Added status-command guidance to orchestratorPrompt.
• Extended TestSpawnOrchestrator_UsesCoordinatorPrompt to assert the status and help hints are present in the orchestrator system prompt.
• Stabilized the native CLI E2E harness by reaping the directly-started daemon child while ao stop polls for shutdown, matching the production ao start behavior.
• Applied goimports/gofmt cleanup to the files reported by CI.

Testing

• env GOTOOLCHAIN=auto GOSUMDB=sum.golang.org GOCACHE=/tmp/ao-go-cache GOPATH=/tmp/ao-gopath go test ./internal/session_manager
• env GOTOOLCHAIN=auto GOSUMDB=sum.golang.org GOCACHE=/tmp/ao-go-cache GOPATH=/tmp/ao-gopath go test -race ./internal/session_manager
• env GOTOOLCHAIN=auto GOSUMDB=sum.golang.org GOCACHE=/tmp/ao-go-cache GOPATH=/tmp/ao-gopath SHELL=/bin/bash go test -tags e2e -run TestE2E_Lifecycle -v ./internal/cli
• env GOTOOLCHAIN=auto GOSUMDB=sum.golang.org GOCACHE=/tmp/ao-go-cache GOPATH=/tmp/ao-gopath SHELL=/bin/bash go test -tags e2e -v ./internal/cli
• env GOTOOLCHAIN=auto GOSUMDB=sum.golang.org GOCACHE=/tmp/ao-go-cache GOPATH=/tmp/ao-gopath SHELL=/bin/bash go test ./...
• env GOTOOLCHAIN=auto GOSUMDB=sum.golang.org GOCACHE=/tmp/ao-go-cache GOPATH=/tmp/ao-gopath SHELL=/bin/bash npm run lint
• env GOTOOLCHAIN=auto GOSUMDB=sum.golang.org GOCACHE=/tmp/ao-go-cache GOPATH=/tmp/ao-gopath SHELL=/bin/bash go test -race ./...

Fixes #2197

[Vaibhaav-Tiwari]

lgtm but there are some failing checks so please fix those