Content-addressed dedup

Files live in a shared files/ blob store; each ffs tree references blobs by hash. Duplicate uploads do not multiply raw storage when refcounts align.

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Quotas

Owned vs participation — usage aggregates from catalog + mirrors.
Billable bytes — plan limits use configurable dedup divisor when enabled.
Free tier: 100 MB billable (see plans); Plus/Team raise caps.

Engine details: fractal_zip containers and FZC compression on Plus.