Add lottery code to RequestResponse in Epson, Custom PrinterRT and RT…

[danielscainifiskaltrust]

Context

For sale receipts (POSRECEIPT), the EpsonRTPrinter and CustomRTPrinter SCUs did not
expose the receipt lottery code (codicelotteria) in the ReceiptResponse signatures:
RTCodiceLotteria was hardcoded to an empty string. As a result the code did not appear
in either of the two places the QueueIT layer derives it from:

• the <rt-lottery-id> signature, and
• the Codice Lotteria: line in the [www.fiskaltrust.it] footer (built by the queue from RTLotteryID).

This aligns both printer SCUs with the existing behavior: populating RTCodiceLotteria
on the sale signature data drives both outputs automatically.

Changes

EpsonRTPrinter (EpsonRTPrinterSCU.cs)

• Added a GetLotteryCode(ReceiptRequest) helper
  (GetLotteryData()?.servizi_lotteriadegliscontrini_gov_it?.codicelotteria ?? "").
• Populated RTCodiceLotteria on every POSRECEIPT signature path:
  PerformProtocolReceiptAsync, PerformClassicReceiptAsync, and the two network-recovery
  paths RetryReceiptWithRecoveryAsync and ApplyRecoveredDoc
  (the latter gained a lotteryCode parameter, passed by its callers that hold the ReceiptRequest).

CustomRTPrinter (CustomRTPrinterSCU.cs)

• PerformDeliveryNoteAsync (POSRECEIPT) now reads the lottery code and sets RTCodiceLotteria.
• PerformClassicReceiptAsync already set it → unchanged.

Refund / Void / management documents keep RTCodiceLotteria = "": the lottery code is only
attached to sale receipts (POSRECEIPT), consistent with the rest of the IT integration.

Resulting signature output

For a sale carrying a lottery code, the response now contains:

• <rt-lottery-id> → ftSignatureType 0x4954200000000015, ftSignatureFormat 0x1, Data = <code>
• [www.fiskaltrust.it] footer (ftSignatureType 0x4954200000000001) with a Codice Lotteria: <code> line

Testing

• Both projects build.
• EpsonRTPrinter unit tests pass (8); CustomRTPrinter integration tests are skipped (require real hardware), none failing

Issue
#696

[github-actions]

✅ CLA Signed

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[github-actions]

SCU.IT Test Results

  8 files   8 suites   2s ⏱️
 53 tests 17 ✅ 36 💤 0 ❌
106 runs  34 ✅ 72 💤 0 ❌

Results for commit 4effe22.

[danielscainifiskaltrust]

I have read the CLA Document and I hereby sign the CLA