Renames stale ActiveNodeHealthCheck references to OldestNodeActiveHealthCheck
(Task 7 rename) across the requirements + components doc sets, corrects
leader→oldest-member wording and the embedded IsActiveNode snippet, and adds an
explicit 'production TLS profile not yet implemented' roadmap note.
deploy/wonder-app-vd03 NodeName overlay edits deferred: that production deploy
artifact is not tracked in this repo (same as Tasks 16 & 20).
Organize documentation by moving requirements (HighLevelReqs, Component-*,
lmxproxy_protocol) to docs/requirements/ and test infrastructure docs to
docs/test_infra/. Updates all cross-references in README, CLAUDE.md,
infra/README, component docs, and 23 plan files.