Doc fix and tests fix

1. Cold wallet address format validation (you cannot use a bounceable…

… address for an uninitialized cold wallet)

2. Cold wallet withdrawal hysteresis (after withdrawing to a cold wallet, the amount left on the hot wallet is less than the withdrawal trigger threshold to avoid frequent triggers)
3. Added user_id and transaction_hash to notifications

allowable time lag in env variable

fix fil name

new method and some fixes

doc updates

hotfixes

pre-release