chore(terraform): add chain 2138 env example for testnet runbook

Made-with: Cursor

terraform/phases/phase1/config/env.chain2138.example

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+# Chain ID 2138 — Defi Oracle Meta Testnet
+# Copy to .env.chain2138 (or merge into smom-dbis-138/.env) and fill in values.
+# Runbook: docs/testnet/DEFI_ORACLE_META_TESTNET_2138_RUNBOOK.md
+# Chainlist metadata: pr-workspace/chains/_data/chains/eip155-2138.json
+
+# Network (public RPC example from chainlist; replace with your LAN or staging URL)
+RPC_URL=https://rpc.public-2138.defi-oracle.io
+CHAIN_ID=2138
+
+# Deployer / admin (testnet keys only — never reuse mainnet secrets)
+PRIVATE_KEY=<testnet-deployer-private-key>
+MIRROR_ADMIN=<optional-testnet-admin-address>
+
+# CCIP / LINK — populate only when Chainlink supports chain 2138 (selectors from docs)
+CCIP_ROUTER=<2138-ccip-router-or-leave-empty>
+LINK_TOKEN=<2138-link-token-or-leave-empty>
+
+# Tokens — set after deployment (addresses will differ from mainnet 138)
+WETH9_ADDRESS=<deployed-or-predeployed-weth9-on-2138>
+WETH10_ADDRESS=<deployed-weth10-on-2138>
+
+# Bridges on 2138 — set after deployment
+CCIPWETH9_BRIDGE_CHAIN2138=<address-or-leave-empty>
+CCIPWETH10_BRIDGE_CHAIN2138=<address-or-leave-empty>
+
+# CCIP chain selectors (example mainnet selector kept for cross-chain scripts)
+ETHEREUM_MAINNET_SELECTOR=5009297550715157269
+CHAIN2138_SELECTOR=<YOUR_CHAIN2138_CCIP_SELECTOR>
+
+# Explorer / verification API for 2138
+CHAIN2138_ETHERSCAN_API_URL=https://public-2138.defi-oracle.io
+CHAIN2138_ETHERSCAN_API_KEY=<explorer-api-key-if-required>
+
+# Fee token on 2138 (often native or LINK once deployed)
+FEE_TOKEN=<native-or-link-address>
+
+# thirdweb (optional)
+THIRDWEB_PROJECT_NAME="DBIS ChainID 2138 Testnet"
+THIRDWEB_CLIENT_ID=<your-thirdweb-client-id>
+THIRDWEB_SECRET_KEY=<your-thirdweb-secret-key>