Adopt centralized _worktrees/ convention, clean stale worktree

[lesaai]

Summary

Adopt the centralized _worktrees/ worktree convention and clean up the existing stale worktree.

Current State

A stale worktree exists at components/memory-crystal-private-logs on branch cc-mini/logs-to-ldm-home. This should be removed and any future worktrees created in repos/_worktrees/ per the new convention.

Work Items

• Remove stale memory-crystal-private-logs worktree
• Use ldm worktree (or manual central path) for all future worktrees

Parent

Tracks wipcomputer/wip-ldm-os#130

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filed-by:cc-mini