feat: update GBrain and Hermes host configs for v0.10.0 integration

GBrain: add 'triggers' to keepFields so generated skills pass
checkResolvable() validation. Add version compat comment.

Hermes: un-suppress GBRAIN_CONTEXT_LOAD and GBRAIN_SAVE_RESULTS.
The resolvers handle GBrain-not-installed gracefully, so Hermes
agents with GBrain as a mod get brain features automatically.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

hosts/gbrain.ts

@@ -1,5 +1,10 @@
 import type { HostConfig } from '../scripts/host-config';
 
+/**
+ * GBrain host config.
+ * Compatible with GBrain >= v0.10.0 (doctor --fast --json, search CLI, entity enrichment).
+ * When updating, check INSTALL_FOR_AGENTS.md in the GBrain repo for breaking changes.
+ */
 const gbrain: HostConfig = {
   name: 'gbrain',
   displayName: 'GBrain',
@@ -13,7 +18,7 @@ const gbrain: HostConfig = {
 
   frontmatter: {
     mode: 'allowlist',
-    keepFields: ['name', 'description'],
+    keepFields: ['name', 'description', 'triggers'],
     descriptionLimit: null,
   },