WP-7.7: define the portable restore contract

[fazpu]

Summary

• replace the planned UGM export/import subsystem with D75: operators move PostgreSQL, objects, and Git using native tools while the library owns the authoritative-state definition and fail-closed restore order
• retain D74 manifest-first readiness and rebuild-first portability without adding an archive format, backup coordinator, ports, settings, or public CLI commands
• add a real PostgreSQL old-state restore proof that rematerializes portable forget intent, re-scrubs forgotten rows, and preserves independent control data
• reconcile the binding designs, requirements, decision log, roadmap, eval check, test evidence, and public project status

Validation

• 2 real PostgreSQL forget-catalog tests passed, including the new restore/readiness proof
• 2 S55 logical/self-host restore tests passed
• 4 hard-forget ordering/delegation tests passed
• Ruff lint and format passed
• Pyright passed with 0 errors, warnings, or information messages
• import-linter: 5 contracts kept, 0 broken
• eval-banana: 84 checks validated
• public docs production build passed
• Grok 4.5 review: PASS, no blocking or material findings

[github-actions]

Coverage report

Click to see where and how coverage changed

File	Statements	Missing	Coverage	Coverage (new stmts)	Lines missing
src/ultimate_memory/spine
forget.py
Project Total

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