Add friendly scrape names and a completeness check

media-scrape/src/store.ts

@@ -657,6 +657,17 @@ export class ScrapeStore {
             .run(preview.hash, preview.bytes, preview.ext ?? "webp", id);
     }
 
+    /** Message span of the walk, for completeness checks. */
+    dbSummary(): { messages: number; oldest: string | null; newest: string | null } {
+        const row = this.db
+            .prepare(
+                "SELECT COUNT(*) AS messages, MIN(timestamp) AS oldest, MAX(timestamp) AS newest FROM messages"
+            )
+            .get() as { messages: number; oldest: string | null; newest: string | null } | undefined;
+
+        return { messages: row?.messages ?? 0, oldest: row?.oldest ?? null, newest: row?.newest ?? null };
+    }
+
     /** Preview state for the whole scrape and per kind, for the backfill UI. */
     previewCounts(): {
         total: number;