fix(api/cclog): log Supabase insert errors (firecrawl#3444)

The Supabase JS client returns {data, error} on insert failures rather
than throwing, so the existing try/catch silently swallowed all insert
failures. Read .error and log it so insert failures (e.g. FK violations
on stale concurrency-limiter Redis keys) become visible.

Co-authored-by: firecrawl-spring[bot] <254786068+firecrawl-spring[bot]@users.noreply.github.com>
Co-authored-by: micahstairs <micah@sideguide.dev>

Author: firecrawl-spring[bot]

apps/api/src/controllers/v0/admin/cclog.ts

@@ -46,7 +46,15 @@ async function cclog() {
       }
 
       try {
-        await supabase_service.from("concurrency_log").insert(entries);
+        const { error } = await supabase_service
+          .from("concurrency_log")
+          .insert(entries);
+        if (error) {
+          logger.error("Error inserting", {
+            error,
+            entryCount: entries.length,
+          });
+        }
       } catch (e) {
         logger.error("Error inserting", { error: e });
       }