Revert to Qwen2.5-72B (text) + push search tool and deps

.gitignore

@@ -0,0 +1,4 @@
+__pycache__/
+*.pyc
+.venv/
+.python-version

app.py

@@ -37,7 +37,7 @@ class BasicAgent:
 
         # Requires HF_TOKEN in the environment (set as a Space secret on HF).
         llm = HuggingFaceEndpoint(
-            repo_id="Qwen/Qwen2.5-VL-72B-Instruct",
+            repo_id="Qwen/Qwen2.5-72B-Instruct",
             max_new_tokens=2048,
             temperature=0.1,
             huggingfacehub_api_token=os.getenv("HF_TOKEN"),

requirements.txt

@@ -3,5 +3,7 @@ requests
 pandas
 langgraph
 langchain-core
+langchain-community
 langchain-huggingface
 huggingface_hub
+ddgs

tools.py

@@ -0,0 +1,3 @@
+from langchain_community.tools import DuckDuckGoSearchRun
+
+search_tool = DuckDuckGoSearchRun()