Spec: eliminate hardcoded values from framework templates

[koad]

Problem

Framework templates contain hardcoded values that should be operator-configurable:

1. Domain — currently hardcoded as in GPG email (now fixed with interactive prompt in gestate)
2. Home machine — hardcoded as in skeleton CLAUDE.md template
3. Git author email — has domain suffix that should match operator's domain

Pattern

The framework should ask the operator for their configuration, not assume defaults. Each entity should be configurable at gestate time.

Scope

• Document the principle: "nothing hardcoded, everything configurable at gestate"
• Audit all skeleton templates for hardcoded values
• Define what should be prompted vs what should inherit from mother entity

Related

• gestate: prompt for home machine name during entity creation juno#70 (machine name prompt)
• gestate: replace hardcoded kingofalldata.com with KOAD_IO_DOMAIN config vulcan#61 (domain prompt) — implemented