refresh card (through block-9183600)

README.md

@@ -41,10 +41,10 @@ scheme: they were **rebuilds**, not byte mirrors, and are known to differ from
 the scored tars (see the repo issue history). Use the `-block-<N>` folders for
 exact replay.
 
-## Latest revealed — `2026-09-30` (block 9180000)
+## Latest revealed — `2026-10-01` (block 9183600)
 
-- **series:** 3404
-- **sha256:** `f167540bb02b04ed8ad5baa6c45071bdf880eef22c472faab7574175116c664e`
+- **series:** 3409
+- **sha256:** `386b2b26c10e18e59d224faf73851e00f4a4dbbb83a727b0d8d72fb1028647c9`
 
 > This is an **evaluation** set, not training data. Publishing it to train on
 > would contaminate the benchmark it exists to measure.