fix(sase): catalog-coverage Prisma make_interval(bigint) error

Prisma serialized windowDays as bigint -> make_interval(days => bigint) does
not exist (42883), so detectCatalogCoverageGaps threw on every real call: the
evening brief silently dropped its Sase-DB half and catalog-gap-detect never
created insights. Use a JS Date param (matches the rest of the codebase).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

apps/web/src/lib/sase/catalog-coverage.ts

@@ -23,6 +23,7 @@ export async function detectCatalogCoverageGaps(
 ): Promise<CatalogGap[]> {
   const windowDays = opts.windowDays ?? 7;
   const minFailures = opts.minFailures ?? 3;
+  const since = new Date(Date.now() - windowDays * 864e5);
 
   // Brand is the first token of the identified label; initcap() folds HONDA/Honda
   // into one group. array_agg collects the distinct "<Brand> <Year>" identities so
@@ -42,7 +43,7 @@ export async function detectCatalogCoverageGaps(
              trim(substring(error_message FROM 'identified as (.*)$')) AS label
       FROM query_logs
       WHERE success = false
-        AND created_at > now() - make_interval(days => ${windowDays})
+        AND created_at > ${since}
         AND error_message LIKE 'No catalog%'
     )
     SELECT