feat(phase6): bytes-based billing - dual metric support

- session_create_bytes() + session_add_bytes() for bytes-metric sessions
- session_is_expired() dispatches on config metric (bytes vs milliseconds)
- cashu_calculate_allotment() unified dispatcher for both metrics
- tollgate_api discovery/usage/session_event use configured metric
- config: metric field defaults to 'bytes', step_size_bytes=22020096 (21MB)
- 14 new unit tests (148 total passing)
- ASSERT_EQ_UINT64 macro added to test framework

1 files changed, 2 insertions, 2 deletions

diff --git a/tests/unit/Makefile b/tests/unit/Makefile
index f31172b..53bcc2c 100644
--- a/tests/unit/Makefile
+++ b/tests/unit/Makefile
@@ -59,8 +59,8 @@ test_nostr_event: test_nostr_event.c $(REPO_ROOT)/main/nostr_event.c $(REPO_ROOT
 test_cashu: test_cashu.c $(REPO_ROOT)/main/cashu.c
         $(CC) $(CFLAGS) $< $(REPO_ROOT)/main/cashu.c -o $@ $(LDFLAGS)
 
-test_session: test_session.c $(REPO_ROOT)/main/session.c
-        $(CC) $(CFLAGS) $< $(REPO_ROOT)/main/session.c -o $@ $(LDFLAGS)
+test_session: test_session.c $(REPO_ROOT)/main/session.c $(REPO_ROOT)/main/cashu.c
+        $(CC) $(CFLAGS) $< $(REPO_ROOT)/main/session.c $(REPO_ROOT)/main/cashu.c -o $@ $(LDFLAGS)
 
 test_tollgate_client: test_tollgate_client.c
         $(CC) $(CFLAGS) $< -o $@ $(LDFLAGS)