refactor(session-query): unify query service

packages/session-query/session-query/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@deepseek-ai/dsh-session-query",
-  "description": "Live-preferred exact session-history retrieval and tracing service (ctx.sessionQuery)",
+  "description": "Combined session query service contract with concrete reads, traces, and filters",
   "version": "0.0.1",
   "private": true,
   "type": "module",
@@ -40,9 +40,6 @@
       "optional": true
     }
   },
-  "dependencies": {
-    "schemastery": "^3.18.0"
-  },
   "devDependencies": {
     "@deepseek-ai/dsh-brand": "workspace:^",
     "@deepseek-ai/dsh-invariants": "workspace:^",