better date serilization (#5207)

Cargo.lock

@@ -6078,6 +6078,7 @@ dependencies = [
  "nym-network-defaults",
  "nym-node-requests",
  "nym-node-status-client",
+ "nym-serde-helpers",
  "nym-statistics-common",
  "nym-task",
  "nym-validator-client",

nym-node-status-api/nym-node-status-api/Cargo.toml

@@ -26,6 +26,7 @@ nym-node-status-client = { path = "../nym-node-status-client" }
 nym-crypto = { path = "../../common/crypto", features = ["asymmetric", "serde"] }
 nym-explorer-client = { path = "../../explorer-api/explorer-client" }
 nym-network-defaults = { path = "../../common/network-defaults" }
+nym-serde-helpers = { path = "../../common/serde-helpers"}
 nym-statistics-common = { path = "../../common/statistics"}
 nym-validator-client = { path = "../../common/client-libs/validator-client" }
 nym-task = { path = "../../common/task" }

nym-node-status-api/nym-node-status-api/src/http/models.rs

@@ -79,6 +79,7 @@ pub(crate) struct SummaryHistory {
 pub struct SessionStats {
     pub gateway_identity_key: String,
     pub node_id: u32,
+    #[serde(with = "nym_serde_helpers::date")]
     pub day: time::Date,
     pub unique_active_clients: i64,
     pub session_started: i64,