Changes to WEO indicator across countries (prefer time_period for comparison)

added the non-success response with the status 500

added the optional property meta/stale_since to the response with the 200 status

added the optional property meta/data_age_days to the response with the 200 status

added the optional property meta/notes to the response with the 200 status

added the optional property meta/period to the response with the 200 status

added the optional property data/compare_mode to the response with the 200 status

added the optional property data/count to the response with the 200 status

added the optional property data/countries to the response with the 200 status

added the optional property data/description to the response with the 200 status

added the optional property data/imf_id to the response with the 200 status

added the optional property data/indicator to the response with the 200 status

added the optional property data/note to the response with the 200 status

added the optional property data/source to the response with the 200 status

added the optional property data/time_period to the response with the 200 status

added the optional property data/unit to the response with the 200 status

added the optional property data/upstream to the response with the 200 status

added the optional property data/vintage to the response with the 200 status

added the optional property code to the response with the 401 status

added the optional property code to the response with the 429 status

added the optional property code to the response with the 503 status

added the optional property hint to the response with the 401 status

added the optional property hint to the response with the 429 status

added the optional property hint to the response with the 503 status

added the optional property plan to the response with the 401 status

added the optional property plan to the response with the 429 status

added the optional property plan to the response with the 503 status

added the optional property reason to the response with the 401 status

added the optional property reason to the response with the 429 status

added the optional property reason to the response with the 503 status

added the new optional query request parameter time_period