Add permanent_removal flag to ContractDeleteTransaction #1208
Description
Summary
ContractDeleteTransaction does not expose a permanent_removal boolean flag that is required by the underlying ContractDeleteTransactionBody protobuf.
Expected Behavior
The SDK should expose a permanent_removal toggle on ContractDeleteTransaction so users can explicitly set this required field when constructing a contract delete transaction.
Actual Behavior
ContractDeleteTransaction does not include a permanent_removal field, even though it exists in the protobuf definition.
Impact
- Prevents users from fully configuring contract delete transactions
- Creates a mismatch between SDK API surface and protobuf requirements
- Makes it impossible to explicitly control contract deletion semantics