Metadata parameters validation bypass in FA’s `mutate_metadata` function

[supra-yoga]

Description

The fungible asset module implements metadata parameter validations during initial creation through the add_fungibility function. These validations enforce important constraints like MAX_NAME_LENGTH (32), MAX_SYMBOL_LENGTH (10), MAX_DECIMALS (32), and MAX_URI_LENGTH (512). However, the mutate_metadata function, which can modify these parameters post-creation, lacks these validation checks.

This could cause display issues in wallets and explorers due to excessive lengths in names, symbols, and URIs, while decimal modifications beyond MAX_DECIMALS might lead to inconsistent token displays.

Recommendation

Add validation checks in the mutate_metadata function that match exactly with those in add_fungibility.