9f2b96e235
Convert the dynamic await import("./agent-session-helpers.js") and
await import("./session-skill-context.js") calls inside the heartbeat
executor to static top-level imports, matching the rationale of
26a14698c (which already made the sibling pi.js import static).
This surfaces ERR_MODULE_NOT_FOUND at engine load time rather than
mid-heartbeat when a worktree is on a branch missing the helpers.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>