feat: Implemented observability layer and benchmarking

app/utils/csv_parser.py

@@ -4,9 +4,12 @@ from datetime import datetime
 from typing import Any, Dict, List
 from app.core.exceptions import InvalidCSVException
 
+from app.core.observability import time_it
+
 REQUIRED_COLUMNS = {"txn_id", "date", "merchant", "amount"}
 
 
+@time_it("Parse and Validate CSV")
 def parse_and_validate_csv(content: bytes) -> List[Dict[str, Any]]:
     """
     Parses CSV content from bytes, validates headers, and checks field types.