Sync AGENTS.md, CLAUDE.md, and .claude/rules from updated project_rules
templates: workplan-first session protocol, legacy terminology footnote,
and GET /workplans/ examples.
Replace repo-seed template identity with disaster-control across
AGENTS.md, SCOPE.md, and .claude/rules. Archive REPO-WP template
workplans. Document dev workflow and classification. Mark WP-0001 finished.