feat(sync): Phase 6 - observability and production readiness

- Add SyncMetrics with full Prometheus integration
- Track sync gaps via catchup events
- Update Grafana dashboard with sync panels
- Document all sync configuration options
- Update design doc with implementation notes

1 files changed, 1 insertions, 0 deletions

diff --git a/Cargo.toml b/Cargo.toml
index 911f5e7..d1650e0 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -61,6 +61,7 @@ tokio-test = "0.4"
 grasp-audit = { path = "grasp-audit" }
 url = "2.5"
 tempfile = "3"
+reqwest = "0.12"
 
 [lib]
 name = "ngit_grasp"