op-reth sepolia fixes: superseed Jovian fork times, Karst v2.3.1 bump, op-sepolia/soneium template fixes

- superseed-sepolia: add holocene/isthmus/jovian fork times to rollup.json (CL)
  and genesis.json (EL). jovian_time=1768978801 is superseed's chain-specific
  activation (verified live via sepolia.superseed.xyz optimism_rollupConfig);
  the official superseed-xyz/node repo + the old committed config both lacked it,
  causing op-node "failed to parse L1 info deposit tx ... unexpected length: 178".
- op-reth v2.3.0 -> v2.3.1 across all op-reth composes (Karst-mandatory release,
  Sepolia activation Jun 17 2026 16:00 UTC).
- op-sepolia: --chain=optimismsepolia -> optimism-sepolia (invalid chain spec
  prevented op-reth from starting).
- soneium-minato-sepolia (reth/geth/erigon): L1 upstream vars now resolve to
  ETHEREUM_SEPOLIA_* (were ETHEREUM_MINATO-SEPOLIA_*, nonexistent -> no L1 RPC);
  state-cache shell var de-hyphenated; pectra blob-schedule override now emitted.

NOTE: superseed karst_time not yet published by the chain; must be added before
Jun 17 2026 once superseed announces it.

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

op/superseed/sepolia/genesis.json

@@ -22,6 +22,9 @@
       "ecotoneTime": 1720195200,
       "fjordTime": 1720627201,
       "graniteTime": 1725984001,
+      "holoceneTime": 1732633200,
+      "isthmusTime": 1744905600,
+      "jovianTime": 1768978801,
       "terminalTotalDifficulty": 0,
       "terminalTotalDifficultyPassed": true,
       "optimism": {

op/superseed/sepolia/rollup.json

@@ -33,7 +33,9 @@
   "ecotone_time": 1720195200,
   "fjord_time": 1720627201,
   "granite_time": 1725984001,
-  "isthmus_time":1744905600,
+  "holocene_time": 1732633200,
+  "isthmus_time": 1744905600,
+  "jovian_time": 1768978801,
   "batch_inbox_address": "0x3a81f59e6bf4238d1ed202f3b06389454de3f204",
   "deposit_contract_address": "0x7a0db8c51432d2c3eb4e8f360a2eeb26ff2809fb",
   "l1_system_config_address": "0x4df2f170214198df84716b89c84b0c177c39f6c9"