op/doma: rename celestia relay to op-alt, add mainnet op-alt relay, vendor mainnet rollup.json

- Rename doma testnet relay from celestia to op-alt (ghcr.io/celestiaorg/op-alt-da)
- Add op-alt relay for doma mainnet with image tag 0.15.0 (not v0.15.0)
- Vendor complete mainnet rollup.json with alt_da (GenericCommitment)
- Fix per-network relay settings: namespace + CELESTIA_*_RPC env vars
- Switch mainnet op-geth to use vendored rollup.json (bind-mounted)

Generated by Mistral Vibe.
Co-Authored-By: Mistral Vibe <vibe@mistral.ai>

op/doma/mainnet/rollup.json

@@ -0,0 +1,52 @@
+{
+  "alt_da": {
+    "da_challenge_contract_address": "0x0000000000000000000000000000000000000000",
+    "da_challenge_window": 1,
+    "da_commitment_type": "GenericCommitment",
+    "da_resolve_window": 1
+  },
+  "batch_inbox_address": "0x0067431dec3841e994040d1684a0d2b8356c7ec7",
+  "block_time": 2,
+  "canyon_time": 0,
+  "chain_op_config": {
+    "eip1559Denominator": 50,
+    "eip1559DenominatorCanyon": 250,
+    "eip1559Elasticity": 6
+  },
+  "channel_timeout": 300,
+  "delta_time": 0,
+  "deposit_contract_address": "0x14ea6add7fa61001bd2e38100bfdf2cd710e44d9",
+  "ecotone_time": 0,
+  "fjord_time": 0,
+  "genesis": {
+    "l1": {
+      "hash": "0xab2deb62e1bacf4e234208601c4c034a0de49c94f5b876d8d52ae7fdbeda4140",
+      "number": 23370916
+    },
+    "l2": {
+      "hash": "0x37917bf6eee4e0a64a15fd666b477d89030742a3912a69159caa6d9e12731e44",
+      "number": 0
+    },
+    "l2_time": 1757968751,
+    "system_config": {
+      "batcherAddr": "0xb62b97fa3f499dfd858e9b826fb26e6456e0b180",
+      "daFootprintGasScalar": 0,
+      "eip1559Params": "0x0000000000000000",
+      "gasLimit": 30000000,
+      "minBaseFee": 0,
+      "operatorFeeParams": "0x0000000000000000000000000000000000000000000000000000000000000000",
+      "overhead": "0x0000000000000000000000000000000000000000000000000000000000000000",
+      "scalar": "0x010000000000000000000000000000000000000000000000000c5fc500000558"
+    }
+  },
+  "granite_time": 0,
+  "holocene_time": 0,
+  "isthmus_time": 0,
+  "jovian_time": 1769065201,
+  "l1_chain_id": 1,
+  "l1_system_config_address": "0xc5a1385705ccf92b48a4796117196503af569960",
+  "l2_chain_id": 97477,
+  "max_sequencer_drift": 600,
+  "regolith_time": 0,
+  "seq_window_size": 3600
+}