Phase 5: Lightning auto-payout with LNURL-pay and NUT-05 melt

- New lnurl_pay.c/h: LNURL-pay protocol (GET .well-known/lnurlp + callback)
- New lightning_payout.c/h: threshold-based auto-payout with multi-recipient split
- Extended nucula_wallet bridge with nucula_wallet_melt() (NUT-05)
- Config: payout section with multi-mint, multi-recipient, fee_tolerance
- Default: enabled, TollGate@coinos.io, min_payout=128, min_balance=64
- 18 new unit tests (all passing), 134 total

1 files changed, 2 insertions, 0 deletions

diff --git a/main/CMakeLists.txt b/main/CMakeLists.txt
index be4d564..c2aaeb2 100644
--- a/main/CMakeLists.txt
+++ b/main/CMakeLists.txt
@@ -11,6 +11,8 @@ idf_component_register(SRCS "tollgate_main.c"
                             "geohash.c"
                             "wifistr.c"
                             "tollgate_client.c"
+                            "lnurl_pay.c"
+                            "lightning_payout.c"
                     INCLUDE_DIRS "."
                     REQUIRES esp_wifi esp_event esp_netif nvs_flash esp_http_server
                              lwip json esp_http_client mbedtls esp-tls log spiffs