Implement node management and configuration utilities

[touchthesun]

Provide tools to manage node lifecycle, configure federation settings, and control sync behavior.

Acceptance Criteria

• Node config schema defined
• CLI commands for node init/start/stop
• Config validation and defaults
• Ability to update peer lists dynamically

Dependencies

• Issue 5.1.4 (node discovery)

Estimated Effort

M (4-6 days)

Technical Notes

Add commands in src/cli/system.py or new src/cli/federation.py.

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Generated from notes/github-issues.md — Issue 5.5.1