Update backend model

app.py

@@ -6,7 +6,7 @@ from huggingface_hub import InferenceClient
 
 HF_TOKEN = os.environ.get("HF_TOKEN")
 client = InferenceClient(
-    model="Qwen/Qwen2.5-Coder-32B-Instruct",
+    model="Snowflake/arctic-text2sql-r1-32b",
     token=HF_TOKEN,
 )
 
@@ -34,7 +34,8 @@ SQL RULES:
 - Age filters: use a numeric comparison on the age column directly (e.g. age > 50).
 - Counts: use COUNT(*) or COUNT(column). Alias it clearly, e.g. AS num_patients.
 - INSERT, UPDATE, DELETE, CREATE, DROP, ALTER are all allowed — the user owns their database.
-
+- Identifier quoting: always wrap table and column names in double quotes if they start with a digit or contain special characters (e.g. "2b_concept", "my-column").
+...
 FEW-SHOT EXAMPLES:
 
 Schema: