feat(mining): add new mining source files and unit tests

- mining_payment.c/h: hashprice calc, share validation, per-client hashrate
- stratum_client.c/h: SV1 upstream pool connection
- stratum_proxy.c/h: local SV1 TCP server for downstream miners
- sw_miner.c/h: software SHA256d miner using mbedtls
- asic_miner.c/h: ASIC detection stub (software fallback)
- test_mining_payment.c: 23 unit tests for mining payment module

1 files changed, 4 insertions, 1 deletions

diff --git a/tests/unit/Makefile b/tests/unit/Makefile
index 7ebc3b2..0a726f6 100644
--- a/tests/unit/Makefile
+++ b/tests/unit/Makefile
@@ -22,7 +22,7 @@ LDFLAGS := -lmbedcrypto -lcjson -lm
 
 SECP256K1_OBJ := secp256k1.o precomputed_ecmult.o precomputed_ecmult_gen.o
 
-TESTS := test_geohash test_identity test_nostr_event test_cashu test_session test_tollgate_client test_lnurl_pay test_lightning_payout test_mcp_handler test_nip04 test_cvm_server
+TESTS := test_geohash test_identity test_nostr_event test_cashu test_session test_tollgate_client test_lnurl_pay test_lightning_payout test_mcp_handler test_nip04 test_cvm_server test_mining_payment
 
 .PHONY: all test clean $(TESTS)
 
@@ -81,5 +81,8 @@ test_nip04: test_nip04.c $(REPO_ROOT)/main/nip04.c $(SECP256K1_OBJ)
 test_cvm_server: test_cvm_server.c
         $(CC) $(CFLAGS) $< -o $@ $(LDFLAGS)
 
+test_mining_payment: test_mining_payment.c $(REPO_ROOT)/main/mining_payment.c
+        $(CC) $(CFLAGS) $< $(REPO_ROOT)/main/mining_payment.c -o $@ $(LDFLAGS)
+
 clean:
         rm -f $(TESTS) $(SECP256K1_OBJ)