v0.7.1 — Hard reset, enriched status, Ralph safeguards

What's new

• /hardreset command — nuclear reset that kills all agents, clears scheduled tasks, wipes sessions, kills orphan processes, and restarts.
• Enriched /status command — now shows version, scheduled tasks count, running processes, memory usage, session size, and categorized error summary for today.
• Memory reliability improvements — session file cleanup on reset, preventing ghost context from old conversations.
• Ralph safeguards — better failure handling and complexity-based iteration limits.
• Fast-path routing — infrastructure for lightweight API calls on simple messages (mothballed pending API key support).
• PID lock hardening — prevents duplicate process spawning.
• Session auto-prune — stale sessions cleaned up automatically.