Align Missena adapter request payload with PBS Go

[ysfbsf]

Summary

• align the Missena Java adapter outbound payload with the PBS Go adapter
• replace the Missena bidder param test with sample
• forward apiKey in params, plus top-level debug and userEids
• update the Missena bidder schema, unit test, and integration fixtures

Testing

• git diff --check -- src/main/java/org/prebid/server/bidder/missena src/main/java/org/prebid/server/proto/openrtb/ext/request/missena src/main/resources/static/bidder-params/missena.json src/test/java/org/prebid/server/bidder/missena src/test/resources/org/prebid/server/it/openrtb2/missena
• jq empty src/main/resources/static/bidder-params/missena.json src/test/resources/org/prebid/server/it/openrtb2/missena/test-auction-missena-request.json src/test/resources/org/prebid/server/it/openrtb2/missena/test-missena-bid-request.json

[ysfbsf]

@CTMBNara friendly ping for a re-review when you get a chance 🙏

The requested passthrough test was added back in June: makeBidsShouldReturnBidWithoutSizeWhenResponseHasNoSize covers the null-size path, and the makeBids assertions cover width/height reaching Bid.w/Bid.h. The branch was merged with upstream master on Jul 29 and is currently MERGEABLE.

Some context on why the size passthrough matters to us in production. With w/h unset, ResponseBidValidator.bannerSizeIsNotValid() treats the bid as invalid (bidW == null || bidW > maxSize.getW() || ...), so a live publisher currently gets:

BidResponse validation `warn`: bidder `missena` response triggers creative size validation
for bid <id>, account=<id>, max imp size='320x100', bid response size='nullxnull'

On warn the bid survives but reaches the ad server with no hb_size targeting key, so size-keyed line items can't match. On any account configured with enforce, every Missena banner bid is dropped as RESPONSE_REJECTED_INVALID_CREATIVE_SIZE_NOT_ALLOWED.

Happy to make any further changes needed to get this over the line.