docs: bilingual credentials/settings-consumer documentation, catalogs, and gates

New credentials data-structure page (type-equiv manifested), group README,
rewritten llm-deepseek/llm-pi-ai READMEs (dynamic configuration, dict
profiles, credential chain), capability-seams/service-role registration,
Agent Note (bilingual), demo compositions mounting settings-local +
credentials-local with no inline key plumbing, installSettingsSection
consumer helper on the settings seam (deduplicating both adapters' wiring),
jscpd symmetry markers for the provider twins, runtime-closure additions for
python/sdk-runtime, and doc-budget ceilings AGENTS.md 1750→1755 /
packages/README.md 850→865 for the structural one-line group rows.

scripts/gen-doc-graphs.ts

@@ -143,8 +143,17 @@ const SERVICE_ROLES: ServiceRole[] = [
     title: 'User-settings seam',
     mode: 'seam',
     implementations: ['settings-local'],
-    consumers: [],
-    note: 'Plugins register namespace schemas and resolve layered values; providers store the raw document. No production consumer is migrated yet.',
+    consumers: ['llm-deepseek', 'llm-pi-ai'],
+    note: 'Plugins register namespace schemas and resolve layered values; providers store the raw document. The LLM adapters register their entry config as the composition base under the user section.',
+  },
+  {
+    key: 'credentials',
+    pkg: 'credentials',
+    title: 'Credential seam',
+    mode: 'seam',
+    implementations: ['credentials-local'],
+    consumers: ['llm-deepseek', 'llm-pi-ai'],
+    note: 'Configuration carries references to secrets; providers own the values. Consumers resolve per operation, so a rotated credential reaches the very next request.',
   },
   {
     key: 'telemetry',