Invoice rpc metadata support#10316

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sputn1ck wants to merge 3 commits intolightningnetwork:masterfrom

sputn1ck:invoice_rpc_metadata_support

Commits on Oct 23, 2025

lnrpc: add metadata field to Invoice, PayReq, and AddHoldInvoiceRequest
sputn1ck
committed
invoicesrpc+rpcserver: wire up metadata support in invoice RPCs
sputn1ck
committed
itest: add integration tests for invoice metadata
sputn1ck
committed