Add compact Mission aggregate watch

[uesugitorachiyo]

Summary

• add --compact output for mission aggregate --watch
• keep compact watch readback bounded and no-authority
• refresh Mission provenance examples with gateway readiness rollup diagnostics

Verification

• go test ./... -count=1
• go vet ./...
• go build -o /tmp/ao-command-build-verify ./cmd/ao-command
• ./scripts/production-readiness-audit.sh
• git diff --check