adding fin goals and tools

tools/fin/check_account_valid.py

@@ -0,0 +1,24 @@
+from pathlib import Path
+import json
+
+# this is made to demonstrate functionality but it could just as durably be an API call
+# called as part of a temporal activity with automatic retries
+def check_account_valid(args: dict) -> dict:
+    
+    email = args.get("email")
+    account_id = args.get("account_id")
+
+    file_path = Path(__file__).resolve().parent.parent / "data" / "customer_account_data.json"
+    if not file_path.exists():
+        return {"error": "Data file not found."}
+    
+    with open(file_path, "r") as file:
+        data = json.load(file)
+    account_list = data["accounts"]
+
+    for account in account_list:
+        if account["email"] == email or account["account_id"] == account_id:
+            return{"status": "account valid"}
+        
+    return_msg = "Account not found with email address " + email + " or account ID: " + account_id
+    return {"error": return_msg}