docs(link): the phase the measurement cancelled, and the 452 wrong pictures it found on the way (Phase 6)

§16 planned deep animation keys and a bulk-fill switch. Measuring first changed
the phase: a complete one-direction animation set is 174,453 frames / 281.5 MB
(not the ~119,000 / ~117 MB §11 estimated), every frame carries its own centre
and 23,818 of 26,274 actions have frames of differing size — and the site
displays still pictures. So none of it was built (§11.2, org lead 2026-09-11);
`body/<id>/a<n>/f<k>` stays named in §5 and refused in practice.

§4.10 is what the walk found instead. A body's actions are a contiguous band and
the next body's begin immediately after, so one action past the ceiling is a real
record of another creature: 643 of 795 legacy bodies pass every check there and
452 are byte-identical to body+1's action 0. `Animations.GetAnimLength` is not
the ceiling — it disagrees with the index arithmetic on one body of this client,
by nine actions.

What shipped: the 73 bodies with no art at action 0 (a horse at `body/820/a23`),
the catalogue key carrying its action, the atlas join that reads it instead of
hardcoding `a0`, and the ceiling that makes the fallback walk safe. Catalogue
1,022 -> 1,095; EXTRACTOR_VERSION 2 -> 3; protocol stays 8.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_016wDDVXWMDz82WqE1i969r4

modules/uo/SCHEMA.md

@@ -202,7 +202,7 @@ Creature artwork read from the shard's own UO client ([`link/v8.md`](../../link/
 
 | Table | Shape |
 |---|---|
-| `shard_assets` | `asset_key` VARCHAR PK (§5's key, e.g. `body/34/a0`, `static/3922/h33`, `land/3`), `family`, `sha256`, `bytes`, `width`, `height`, `body`, `direction`, `file`, `catalog`, `imported_at` |
+| `shard_assets` | `asset_key` VARCHAR PK (§5's key, e.g. `body/34/a0`, `body/820/a23`, `static/3922/h33`, `land/3`), `family`, `sha256`, `bytes`, `width`, `height`, `body`, `action`, `direction`, `file`, `catalog`, `imported_at` |
 | `shard_creature_bodies` | `slug` PK, `type_name` (the ServUO class name asked), `body` nullable, `status`, `resolved_at` |
 | `shard_asset_meta` | Singleton (`id = 1`), `payload` JSON (catalogue id, extractor version, source fingerprint, counts), `imported_at` |