Fix stale status display by paginating drawer metadata

[ldtalexthip]

Summary

• mempalace status hard-caps col.get(limit=10000, ...) which makes the header literally display MemPalace Status — 10000 drawers once a palace exceeds 10k drawers.
• Room totals freeze at whatever fell inside the first 10k page, so long-lived palaces silently drift out of sync with Chroma.
• This patch paginates in 5k chunks up to col.count() so the reported totals match what's actually stored.

Before:

MemPalace Status — 10000 drawers
  WING: migration_ops
    ROOM: technical   5401 drawers
    ROOM: general        7 drawers  (actual: 19,475)

After:

MemPalace Status — 45743 drawers
  WING: migration_ops
    ROOM: general    19475 drawers
    ROOM: technical   5401 drawers
    ...

Test plan

• Run mempalace status against a palace with >10k drawers — totals now match col.count()
• Run against an empty palace — no divide-by-zero / empty-list issues
• Run against a palace at exactly 10k drawers (boundary) — should loop once with offset=0, then exit

[bensig]

closing in favor of #851 which covers the same status pagination fix and is mergeable. thanks @ldtalexthip!