fix: Track addressables and observables in root AGENTS.md — gardener maintains lifecycle (#744)

Add mandatory Addressables and Observables sections to AGENTS.md so all
agents have a concrete inventory of what the factory has produced.

- AGENTS.md: add Addressables table (website, repo, skill, GitHub org)
  and empty Observables section
- run-gardener.toml: add portfolio lifecycle duties (add, promote,
  remove, flag) to the grooming step
- run-planner.toml: reference portfolio as planning input
- run-predictor.toml: reference portfolio for weakness detection

formulas/run-planner.toml

@@ -107,6 +107,10 @@ and file-at-constraints steps.
 Read these inputs:
   - VISION.md, RESOURCES.md, planner memory (from preflight)
   - Graph report: orphans, cycles, thin_objectives, bottlenecks, disconnected
+  - Portfolio: ## Addressables and ## Observables tables in AGENTS.md —
+    use these as the concrete inventory of what the factory has produced.
+    Plan toward making addressables observable (measurement wired).
+    Vision changes (#733) should trigger a review of these tables.
   - Open issues (from Part A or fresh fetch)
   - Recently closed issues:
       curl -sf -H "Authorization: token $FORGE_TOKEN" \