docs: updated the GraphAgent wiki to reference a general deep_research agent instead of LOINC stuff

Graph-Agents.md

@@ -66,7 +66,7 @@ global_tools:                        # global tools available to nodes
 mcp_servers:                         # MCP servers available to nodes
   - pubmed-search
 conversation_starters:               # suggested prompts in the UI
-  - "Look up LOINC 2160-0"
+  - "Research WebAssembly outside of the browser"
 
 settings:
   max_loop_iterations: 100     # PER-NODE visit cap; default 100 (see below)
@@ -234,7 +234,7 @@ def load_state():
     return json.loads(os.environ.get("GRAPH_STATE", "{}"))
 
 state = load_state()
-codes = (state.get("loinc_codes") or "").strip()
+codes = (state.get("web_search_results") or "").strip()
 next_node = "query_db" if codes else "ask_for_code"
 print(json.dumps({"_next": next_node, "trimmed_codes": codes}))
 ```
@@ -298,11 +298,11 @@ Collects a free-form string from the user.
 ask_for_code:
   id: ask_for_code
   type: input
-  question: "Enter a LOINC code (e.g. 6690-2):"
+  question: "Enter a search term:"
   default: "{{last_used_code}}"   # optional, interpolated against state
   validation: "len(input) > 0"    # optional, see below
   state_updates:
-    loinc_code: "{{input}}"
+    web_search_result: "{{input}}"
   next: query_db
 ```