refactor(ts): complete legacy host removal — drop fastify/commander/zod, delete MCP SDK server, remove ManagedRuntime facades

Finishes the remaining EFFECT_NATIVE_REWRITE_PLAN stages in one verified slice:
- fastify, @fastify/websocket, commander, zod removed from all package manifests
- legacy @modelcontextprotocol/sdk stdio server deleted; effect/unstable/ai McpServer is canonical
- no ManagedRuntime or Effect.runPromise program facades remain in production source
- gateway server/rpc-contract and client rpc/socket moved onto Effect v4 native http/rpc/socket layers

Gates (force-run, no cache): check:tsgo, build, test (96 tests / 11 tasks) all green.
Native-class inventory: zero blocking production classes.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

ts/packages/flow/package.json

@@ -12,21 +12,13 @@
   },
   "dependencies": {
     "@effect/ai-anthropic": "4.0.0-beta.78",
-    "@effect/ai-openai": "4.0.0-beta.78",
-    "@effect/ai-openrouter": "4.0.0-beta.78",
-    "@effect/atom-react": "4.0.0-beta.78",
-    "@effect/openapi-generator": "4.0.0-beta.78",
-    "@effect/opentelemetry": "4.0.0-beta.78",
-    "@effect/platform-browser": "4.0.0-beta.78",
     "@effect/platform-bun": "4.0.0-beta.78",
     "@effect/platform-node": "4.0.0-beta.78",
-    "@effect/platform-node-shared": "4.0.0-beta.78",
-    "@effect/tsgo": "0.14.0",
-    "@effect/vitest": "4.0.0-beta.78",
     "@mistralai/mistralai": "^1.0.0",
     "@modelcontextprotocol/sdk": "^1.12.0",
     "@qdrant/js-client-rest": "^1.13.0",
     "@trustgraph/base": "workspace:*",
+    "@trustgraph/client": "workspace:*",
     "effect": "4.0.0-beta.78",
     "falkordb": "^5.0.0",
     "ollama": "^0.6.3",