Clarify STEP-1 session invocation prompts

[mherschberg]

Summary

• Document short and labeled STEP-1 session invocation forms across scaffold guidance
• Update architecture session templates to accept STEP-1.N and session N.M with optional labels
• Update status output to suggest clearer session titles

Tests

• ./Code/{{PROJECT}}-docs/scripts/check.sh
• ./tests/status-conditional-priority.sh
• ./tests/doctor-dispatcher.sh
• ./tests/links.sh
• ./tests/init-trunk-branch.sh
• ./tests/init-adr-authority.sh
• ./tests/init-mono-origin-reuse.sh
• ./tests/init-license-validation.sh
• ./tests/site-publish.sh