* fix(agent-status): track Codex rollout subagents
* fix(agent-status): resolve cross-day Codex child rollouts and unblock CI gate
Codex files each rollout under its own local start date, so a session that
runs past midnight spawns children into a sibling day directory. Scanning
only the parent's directory left 13% of real subagent spawns (48/371 across
local rollouts) permanently unresolved, which pinned a phantom "working" row
and re-ran readdirSync every poll tick forever. Resolve the child's own day
directory from occurred_at_ms, and time-box a child whose rollout stays
unreadable so a deleted or never-written file can't leak a working row.
Also make the hook HTTP handler return void: the changed-code quality gate
keys findings by span overlap, so this PR's added line inside the pre-existing
async createServer callback resurfaced no-misused-promises as a new finding.
Tests cover cross-day resolution, grace-period retirement, and that the poll
re-arms across successive roster changes (the prior tests passed even when
the poll died after its first change).
* fix(agent-status): keep the Codex subagent poll alive across nested hooks
A nested non-codex CLI inherits its parent's ORCA_PANE_KEY, so its hook
POST reached scheduleCodexSubagentPoll and tore the timer down before the
source guard, silently ending polling while a rollout child was still live.
