Add initiative scheduler for repo Face heartbeats

notes/voidbot-implementation-plan.md

@@ -191,6 +191,7 @@ The runner can hand these to a CLI/MCP tool. The store decides what survives.
 - repo-scoped Discord participation now uses roles as the address boundary and registered webhook personas as the speech boundary. A role mention can summon a `repo-identity-mention` Codex job, but the worker suppresses base-bot auto-posting so the repo identity must speak through the `post_repo_identity_message` MCP tool.
 - repo-scoped Faces now reuse the typed self-state machinery per identity. Role-addressed chats queue bounded `repo-face-rumination` jobs, and those jobs read/write only through `read_repo_face_state` / `apply_repo_face_state_operation` against the identity's `.cc` file.
 - newborn repo Faces now get a repo-local `.voidbot` home on first chat. Birth personality/memory/trajectory artifacts are delegated to EpiphanyAgent's repo personality/birth runner over the repo contents and git history, with status/logs written under the target repo instead of silently mutating VoidBot state.
+- repo-scoped Faces now also have standing heartbeats. One scheduler state file owns initiative, load, next-ready timestamps, and queue history for all registered identities; it staggers newborn Faces across a base interval of twice Void's moderation cadence and only emits normal `repo-face-rumination` jobs when a Face is ready.
 - repo-activity cursor advancement is parent-owned after successful normal rumination passes, so the child can inspect read-only repo weather without stale commits haunting every future pass as fresh material
 - the old memory-organ script family, legacy moderation state template, and legacy context exporter have now been deleted instead of preserved as forensic bait
 - deterministic cleanup is mostly recent scar tissue from failed manual cleanup passes; it should stay deleted rather than be ported unless a future typed operation protects a real invariant in the new model