Extract filter_value_as_f64 helper in compare_json_value

Flattens the Number arm's nested target-coercion match into a
one-line comparison, matching the shape of the String arm. No
behavior change.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01TeyhRfMYjMditek6geDRoQ

src/engine/snapshot/filter.rs

@@ -101,18 +101,19 @@ pub(crate) fn eval_json_comparison(text: &str, field: &str, op: CompareOp, value
     compare_json_value(field_value, op, value)
 }
 
-fn compare_json_value(field_value: &serde_json::Value, op: CompareOp, value: &FilterValue) -> bool {
-    match field_value {
-        serde_json::Value::Number(n) => {
-            let target = match value {
+fn filter_value_as_f64(value: &FilterValue) -> Option<f64> {
+    match value {
         FilterValue::Number(v) => Some(*v),
         FilterValue::Raw(raw) => raw.parse::<f64>().ok(),
-            };
-            match (n.as_f64(), target) {
-                (Some(f), Some(v)) => f.partial_cmp(&v).is_some_and(|ordering| op.matches(ordering)),
-                _ => false,
     }
 }
+
+fn compare_json_value(field_value: &serde_json::Value, op: CompareOp, value: &FilterValue) -> bool {
+    match field_value {
+        serde_json::Value::Number(n) => matches!(
+            (n.as_f64(), filter_value_as_f64(value)),
+            (Some(f), Some(v)) if f.partial_cmp(&v).is_some_and(|ordering| op.matches(ordering))
+        ),
         serde_json::Value::String(s) => {
             let target = match value {
                 FilterValue::Raw(raw) => raw.clone(),