superseed-mainnet: add Jovian (1769065201) + Karst (1787673601) fork times to rollup.json and genesis.json

Live sequencer optimism_rollupConfig carries jovian_time/karst_time; our custom
configs stopped at Isthmus, so the de-32 bench sync diverged at block 21442759
(first Jovian block). Source: https://mainnet.superseed.xyz optimism_rollupConfig.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01RzxemENdcZBCxdGrzXiFvS

op/superseed/mainnet/genesis.json

@@ -31,7 +31,9 @@
       "eip1559Elasticity": 6,
       "eip1559Denominator": 50,
       "eip1559DenominatorCanyon": 250
-    }
+    },
+    "jovianTime": 1769065201,
+    "karstTime": 1787673601
   },
   "nonce": "0x0",
   "timestamp": "0x66e36963",
@@ -15326,4 +15328,4 @@
   "baseFeePerGas": "0x3b9aca00",
   "excessBlobGas": "0x0",
   "blobGasUsed": "0x0"
-}
+}