refactor(chart): Move functions to separate files or folders to improve code structure.

chart/function/gen_unique_name.py

@@ -0,0 +1,11 @@
+import datetime
+import random
+import string
+
+
+async def generate_unique_name(currency_pair: str, date: datetime) -> str:
+    date_str = date.strftime("%Y%m%d")
+    random_suffix = ''.join(random.choices(string.ascii_uppercase + string.digits, k=6))
+    unique_name = f"{currency_pair}_{date_str}_{random_suffix}"
+
+    return unique_name