Merge ticket 045: timeline/log ordering by declared param

src/dto.rs

@@ -78,8 +78,16 @@ pub struct LogsParams {
     pub start_ms: Option<i64>,
     pub end_ms: Option<i64>,
     pub limit: Option<usize>,
-    /// Raw FilterBar query string, e.g. `regex("error") and sequence<5`.
+    /// Raw FilterBar query string, e.g. `regex("error") and ottyl_seq<5`.
     pub filter: Option<String>,
+    /// Ticket 045: an already-declared param name to order the returned entries by, in place of the
+    /// default ingest order (which tracks `ottyl_ts`). `None` (the default) leaves ordering
+    /// unchanged.
+    pub sort_by: Option<String>,
+    /// Ticket 045: only meaningful alongside `sort_by`. `true` (the default) orders lines missing
+    /// that param among themselves by `ottyl_seq` and appends them after the sorted lines; `false`
+    /// drops those lines from the response entirely.
+    pub sort_missing_fallback: Option<bool>,
 }
 
 #[derive(Debug, Deserialize)]