test: fix Midnight CI event helper setup

[prd-carapulse]

Summary

• Restore the bounded _setupMarketOffer(market, maxUnits) test helper used by the new Take event fuzz test from test: events & TickSpacingSetter (2) #924.
• Clear the unused buy-offer maker-seller receiver before the helper buy fill, matching main's UnusedReceiverMustBeZero validation.

Request Context

• Initiator: Mathis / Slack: <@U02NB58F6R3> / GitHub: @MathisGD
• Initial Slack thread: C0B520ZTPJM / thread_ts 1780651759.014659
• Additional context: main CI is red after test: events & TickSpacingSetter (2) #924; forge and forge-old fail during compilation at test/TakeTest.sol:126 and test/TakeTest.sol:135 with Wrong argument count for function call: 2 arguments given but expected 1.
• Rationale: Restore Midnight CI.

Test Plan

• forge fmt src test script certora --check
• forge lint src test script certora --deny notes
• forge build --force --sizes
• GitHub forge workflow on PR head d27aedbd40df34dee7896bacc553c62adc6506ba
• GitHub forge-old workflow on PR head d27aedbd40df34dee7896bacc553c62adc6506ba
• GitHub certora workflow — still in progress
• forge test --force --match-path test/TakeTest.sol --match-test testTakeEmitsEvent -vvv locally — Slack-host Forge reaches EvmError: NotActivated after compilation/event path; GitHub forge workflow passed the full repo test matrix.

Requested by: <@U02NB58F6R3>