Phase 3: Config revisions with rollback for ADF

[AlexMikhalev]

Parent Epic

#637

Summary

Version the orchestrator TOML config before each change, with CLI rollback capability.

Changes Required

terraphim_orchestrator

• New config_history/ directory alongside orchestrator.toml
• Before applying any config change, snapshot current TOML to config-history/YYYY-MM-DDTHH:MM:SS.toml
• Keep last N snapshots (configurable, default 10)
• Prune older snapshots on each save

ADF CLI (bin crate)

• adf config history -- list available snapshots with timestamps
• adf config rollback <timestamp> -- restore config from snapshot
• adf config diff <timestamp> -- show diff between current and snapshot
• Safety: refuse rollback if agents are actively running (or add --force flag)

Config

[config_history]
max_snapshots = 10
history_dir = "/opt/ai-dark-factory/config-history"

Reference

• Paperclip config revisions: packages/db/src/schema/agent_config_revisions.ts
• Paperclip agent service: server/src/services/agents.ts (buildConfigSnapshot, config revision tracking)

Acceptance Criteria

• Config snapshots saved before each change
• adf config history lists available snapshots
• adf config rollback restores from snapshot
• Old snapshots pruned automatically
• Rollback blocked when agents running (unless --force)

[AlexMikhalev]

Storage update

Use terraphim_persistence::Persistable trait for ConfigRevision instead of config-history/*.toml files. See #637 comment for rationale. Key pattern: config-history/{timestamp}. Enables querying revision history and rollback by timestamp without filesystem scanning.