External official modules (bmb, cis, gds, tea, wds) are cloned to
~/.bmad/cache/external-modules/<name>/ and never copied into src/modules/,
so collectAgentsFromModuleYaml silently skipped them and their agents
never reached config.toml. Swap the hardcoded src/modules lookup for a
resolveInstalledModuleYaml() helper that also searches the external cache
(handling src/, skills/, nested, and root layouts) and warns instead of
silently skipping when a module.yaml can't be found.
bbc7d58273