Adds the first MCP tool surface for the escrow validator: takes
party_a/b/recipient pkh hex + open_deadline + lock_period + optional
initial_contributor + initial_lovelace, calls
build_unsigned_escrow_open, returns CBOR-hex of the unsigned tx.
Tool description prefixed with "WIP — UNAUDITED:" per the handoff
discipline. Body includes a wip_warning field reminding callers this
is preprod-only.
Also propagates the escrow_wip feature from aldabra-mcp to
aldabra-dao so building the MCP binary with --features escrow_wip
correctly enables the dao crate's escrow surface.
Cleaned up unused-import warnings (ESCROW_SPEND_EX_UNITS pulled to
test-only scope in agree/settle/veto/refund_timeout — the impl bodies
take ex_units explicitly via args, only tests reference the constant).
35/35 escrow builder tests still pass; aldabra-mcp builds clean with
--features escrow_wip.
The remaining 4 unsigned-write tools (deposit/agree/veto/settle/
refund_timeout) follow the same pattern: pull wallet utxos, optionally
discover the escrow UTxO from chain at script_address, decode datum,
call the corresponding builder, return CBOR-hex JSON.
Kayos
dba3d46271