Estate catalogue: verify or build missing components

[hyperpolymath]

Repo-existence gaps surfaced 2026-06-22 (see memory reference_estate_automation_anatomy).

• did-you-actually-do-that — locate or confirm it doesn't exist
• proof-burrower (echidna Gen-2 component) — confirm/build
• seamstress / avatar-forge / panic-attack (guru backends) — confirm/build
• cicd-squabbler — build (standalone GitHub App; SQUABBLE! action; squabble != bypass)
• Scaffoldia — extract full version from reposystem to top-level