Sync AGENTS.md, CLAUDE.md, and .claude/rules from updated project_rules
templates: workplan-first session protocol, legacy terminology footnote,
and GET /workplans/ examples.
Set bootstrap workplan active and finish all tasks: refine SCOPE.md and
README.md, add Dev Workflow and credential routing to AGENTS.md, propagate
.claude/rules/credential-routing.md, and document early-phase verification
commands (fix-consistency, registry sanity check).
