CT3: the seat mesh-catalog: registrations, versions, outdated, input, entry, version-released, versions-filled, entries with languages

Definition and fixtures; the generated contracts come with CT11 (their fixture
test is the proof: it fails on a fixture the definition does not read).

Builds: design 47 G §2, §3, §4, §100, §108, §394 (registrations read; register,
policy, watch, unwatch act, callers operator and sessions), §349, §372, §375,
§354, §443 (versions, outdated, input, entry; version-released, versions-filled
with no age limit; layouts versions, build-edges, inputs), §307, §260
(catalog-revision.<branch>), §47, §323, §365, §374, §378 (entry: artifacts with
language, edges with stale/order, word and part, the events the streams declare),
§331, §396 (keep objects), §400 (no verb optional), §391 (class).

Claude-Session: https://claude.ai/code/session_01JG73KEq4zoDfM9WtYpcQgZ

contracts/ts/seats/nodebuildnode/tsconfig.json

@@ -1,12 +0,0 @@
-{
-  "compilerOptions": {
-    "target": "ES2022",
-    "module": "NodeNext",
-    "moduleResolution": "NodeNext",
-    "noEmit": true,
-    "strict": true,
-    "skipLibCheck": true,
-    "forceConsistentCasingInFileNames": true
-  },
-  "include": ["src/**/*.ts"]
-}