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