fix(#2594): fold unparseable-approval-row warnings into one aggregated line

hive-c0re/src/stores/approvals.rs

@@ -335,20 +335,36 @@ impl ApprovalLookup {
     }
 }
 
-/// Collect approval rows, dropping (and logging) any that fail to
-/// deserialize. A single malformed / unknown-kind row must never blank
-/// the whole list: `collect::<Result<Vec>>()` is all-or-nothing, so one
-/// bad row used to make `pending()` / `recent_resolved()` error out
-/// wholesale — the dashboard then rendered an empty approvals queue.
+/// Collect approval rows, dropping any that fail to deserialize. A single
+/// malformed / unknown-kind row must never blank the whole list:
+/// `collect::<Result<Vec>>()` is all-or-nothing, so one bad row used to make
+/// `pending()` / `recent_resolved()` error out wholesale — the dashboard then
+/// rendered an empty approvals queue.
+///
+/// Drops are aggregated by error message and logged **once per call** rather
+/// than one line per row: a batch of legacy unknown-kind rows (e.g. the
+/// retired `apply_commit` approvals from the removed non-PR config flow) sit
+/// `pending` forever and would otherwise flood the journal with an identical
+/// warning on every dashboard render. Aggregating keeps the signal (how many,
+/// which error) without the flood.
 fn collect_lenient(rows: impl Iterator<Item = rusqlite::Result<Approval>>) -> Vec<Approval> {
-    rows.filter_map(|r| match r {
-        Ok(a) => Some(a),
-        Err(e) => {
-            tracing::warn!(error = ?e, "skipping unparseable approval row");
-            None
+    let mut out = Vec::new();
+    let mut dropped: std::collections::HashMap<String, usize> = std::collections::HashMap::new();
+    for r in rows {
+        match r {
+            Ok(a) => out.push(a),
+            Err(e) => *dropped.entry(e.to_string()).or_default() += 1,
         }
-    })
-    .collect()
+    }
+    if !dropped.is_empty() {
+        let total: usize = dropped.values().sum();
+        tracing::warn!(
+            dropped = total,
+            by_error = ?dropped,
+            "skipped unparseable approval rows"
+        );
+    }
+    out
 }
 
 fn row_to_approval(row: &rusqlite::Row<'_>) -> rusqlite::Result<Approval> {