[ci skip] refactor claude files: compact CLAUDE.md, clean memory, remove generic agents
CLAUDE.md: 260→72 lines. Moved detailed patterns (NFS, iSCSI, Kyverno
tables, anti-AI, node rebuild) to .claude/reference/patterns.md.
Kept: critical rules, quick patterns, key commands, tier overview, prefs.
Memory: CLAUDE.md is now single source of truth. Auto-memory reduced to
scratch pad (67→25 lines, 5→1 files). MetaClaw DB cleaned from 40→16
entries (removed all infra-specific duplicates, kept cross-project prefs).
Agents: removed generic devops-engineer (885L) and fullstack-developer
(234L). Kept custom cluster-health-checker (48L).
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