Merge pull request #5 from tokenhost/feat/verify-sepolia

Sepolia happy-path: th verify (Etherscan+Sourcify) + chain-config recording

Author: snissn

.env.example

@@ -20,6 +20,8 @@ TH_PRIVATE_KEY=0xreplace_me
 
 # Explorer verification (future: `th verify`)
 ETHERSCAN_API_KEY=replace_me
+# Optionally chain-specific:
+SEPOLIA_ETHERSCAN_API_KEY=replace_me
 
 # --- Build/publish metadata (optional) ---
 # If set, th build/deploy will sign manifest.json (ed25519).