fix: deserialize scheduled_at_ms as string or number (postgres bigint serializes as string)

apps/monitor/src/types.rs

@@ -1,7 +1,19 @@
-use serde::{Deserialize, Serialize};
+use serde::{Deserialize, Deserializer, Serialize};
 use serde_json::Value;
 use std::collections::HashMap;
 
+// Postgres BIGINT sometimes comes back as a JSON string — handle both
+fn deserialize_ms<'de, D: Deserializer<'de>>(d: D) -> Result<Option<i64>, D::Error> {
+    use serde::de::Error;
+    let v: Option<serde_json::Value> = Option::deserialize(d)?;
+    match v {
+        None => Ok(None),
+        Some(serde_json::Value::Number(n)) => Ok(n.as_i64()),
+        Some(serde_json::Value::String(s)) => s.parse::<i64>().map(Some).map_err(D::Error::custom),
+        Some(other) => Err(D::Error::custom(format!("unexpected type for scheduled_at_ms: {other}"))),
+    }
+}
+
 #[derive(Debug, Deserialize)]
 pub struct Monitor {
     pub id:              String,
@@ -13,6 +25,7 @@ pub struct Monitor {
     pub interval_s:      i64,
     pub query:           Option<Value>,
     pub scheduled_at:    Option<String>,   // ISO string for backward compat in PingResult
+    #[serde(deserialize_with = "deserialize_ms")]
     pub scheduled_at_ms: Option<i64>,     // unix ms from API for precise scheduling
     pub regions:         Option<Vec<String>>,
 }