chore(webapp): downgrade SVE/OOE logs in api.v1.tasks.batch to warn

Closes the wrapper-bypass gap on TRIGGER-CLOUD-38 (Batch trigger error,
755 events in 48h). Customer-facing 422 paths now log at warn; only the
500 fall-through escalates to Sentry.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: d-cs

apps/webapp/app/routes/api.v1.tasks.batch.ts

@@ -127,18 +127,26 @@ const { action, loader } = createActionApiRoute(
 
       return json(batch, { status: 202, headers: $responseHeaders });
     } catch (error) {
+      // Customer-facing validation/quota failures (invalid batch shape,
+      // entitlements exhausted). The handler returns 422 with the message;
+      // system handles it gracefully, no alert needed.
+      if (error instanceof ServiceValidationError) {
+        logger.warn("Batch trigger error", { error: error.message });
+        return json({ error: error.message }, { status: 422 });
+      }
+      if (error instanceof OutOfEntitlementError) {
+        logger.warn("Batch trigger error", { error: error.message });
+        return json({ error: error.message }, { status: 422 });
+      }
+
       logger.error("Batch trigger error", {
         error: {
           message: (error as Error).message,
           stack: (error as Error).stack,
         },
       });
 
-      if (error instanceof ServiceValidationError) {
-        return json({ error: error.message }, { status: 422 });
-      } else if (error instanceof OutOfEntitlementError) {
-        return json({ error: error.message }, { status: 422 });
-      } else if (error instanceof Error) {
+      if (error instanceof Error) {
         return json(
           { error: "Something went wrong" },
           { status: 500, headers: { "x-should-retry": "false" } }