Fix missing GBP exchange rate in currency_conversion.json

[osw282]

Issue Description

The GBP (Great British Pound) exchange rate in src/currencyservice/data/currency_conversion.json is set to an empty string "" instead of a numeric value. This causes currency conversion operations involving GBP to fail with NaN values.

Root Cause

In the currency conversion JSON file, the GBP entry is defined as:

"GBP": ""

This empty string value causes mathematical operations in the convert function in server.js to produce NaN results when dividing or multiplying by the empty string.

Impact

• Any currency conversion requests involving GBP (either as source or target currency) will fail
• The service may return invalid results or throw errors
• Users cannot properly convert prices to/from GBP

Recommended Fix

Update the src/currencyservice/data/currency_conversion.json file to include a proper numeric exchange rate for GBP. Based on the other rates in the file (which appear to be EUR-based rates), a typical GBP rate would be around 0.85-0.90.

For example, change:

"GBP": ""

To:

"GBP": "0.8645"

Files Affected

• src/currencyservice/data/currency_conversion.json

Priority

High - This affects core currency conversion functionality for one of the major world currencies.