Attach the agent status-bar counts to the response envelope so the plugin
after-hook can surface the IDE-style status bar (emit-on-change). Skips
internal/transport commands that don’t represent agent tool calls (their
responses never reach the agent, and bash-lifecycle commands fire rapidly).
errors/warnings are read live from the LSP store here; Tier-2/todos are
last-known. Omitted entirely until the Tier-2 cache is populated once.