feat(logging): replace 207 console.log/error/warn with pino structured logger (#58)

- Add pino + pino-pretty dependencies
- Create src/utils/logger.js with env-based LOG_LEVEL
- Replace all 207 console.log/error/warn calls across 46 source files
- Remove [DEBUG], [ERROR] string prefixes (levels convey this)
- Add pino redact for sensitive fields (mnemonic, privateKey, token, etc.)
- Structured logging with context objects instead of string interpolation
- NODE_ENV=production disables pino-pretty transport

49 files changed, 5601 insertions, 6056 deletions

package.json

@@ -11,15 +11,16 @@
     "axios": "^1.7.7",
     "bip39": "^3.1.0",
     "bitcoinjs-lib": "^6.1.6",
+    "csv-writer": "^1.6.0",
     "decompress": "^4.2.1",
     "dotenv": "^16.3.1",
     "ecpair": "^2.1.0",
     "ethereumjs-util": "^7.1.5",
     "hdkey": "^2.1.0",
     "node-telegram-bot-api": "^0.64.0",
+    "pino": "^8.21.0",
     "sqlite3": "^5.1.6",
-    "tiny-secp256k1": "^2.2.3",
-    "csv-writer": "^1.6.0"
+    "tiny-secp256k1": "^2.2.3"
   },
   "devDependencies": {
     "nodemon": "^3.0.2"