docs: add WP-0006 scheduled agent execution workplan

Define activity-core scheduling for kaizen agents on preselected repos:
schedule manifest, prepare CLI, roster resolver handoff, and custodian pilot.
Point TODO/SCOPE at v1.3.0 active work.

TODO.md

@@ -10,18 +10,14 @@ The structure organizes **future tasks** by their impact, just as a changelog or
 
 ## [Unreleased] - *Active Vibe-Coding State* 💡
 
-Tasks in workplan: `workplans/kaizen-agentic-WP-0005-adoption-parity.md` (v1.2.0)
+Tasks in workplan: `workplans/kaizen-agentic-WP-0006-scheduled-agent-execution.md` (v1.3.0)
 
 ### To Add
-* **Gitea publish pipeline verification** — secrets + workflow smoke test
-* **`make agents-sync-package`** — keep `data/agents/` aligned with `agents/`
-* **Install doc sweep** — HELLO_WORLD, CLI_CHEAT_SHEET, AGENT_DISTRIBUTION
+* **ADR-005 + `.kaizen/schedule.yml`** — scheduled agent execution contract
+* **`kaizen-agentic schedule`** — validate, init, prepare, list
+* **activity-core definitions** — weekly coach + optimization on preselected repos
 
-### To Refactor
-* **CI lint gate** — flake8 on `src/` in Gitea Actions
-* **Makefile install hints** — point at Gitea registry or dev install
-
-### Deferred to WP-0006 (v1.3.0)
+### Deferred to WP-0007 (v1.3.0+)
 * Interactive agent selection wizard
 * Agent template schema validation in `validate`
 * Documentation generation from agent metadata