v0.2.1

Fixes

• _signBuilder returned from all FES operations — seed wallet signAndSubmit() now works for transfer, mint, burn, freeze, unfreeze, seize
• Examples verified end-to-end on preprod — all 11 FES lifecycle scripts pass

Full Lifecycle Tested

00-setup             -> Wallet configured
01-init-compliance   -> Blacklist created
02-register          -> Token minted & registered
03-transfer          -> Tokens transferred
04-mint              -> Additional tokens minted
05-burn              -> Tokens burned
06-freeze            -> Address frozen
07-transfer-blocked  -> Transfer denied (blacklisted)
08-seize             -> Tokens seized from frozen address
09-unfreeze          -> Address unfrozen
10-transfer-unfrozen -> Transfer works again