feat: Add production logging gating (Phase 1, Task 1.1)

- Created logger utility with environment-based gating (lib/utils/logger.ts)
- Replaced 517 console.log statements with logger.log (71% reduction)
- Fixed import paths in 15 files (resolved comment-trapped imports)
- Added DEBUG_LOGS=false to .env
- Achieves 71% immediate log reduction (517/731 statements)
- Expected 90% reduction in production when deployed

Impact: Reduced I/O blocking, lower log volume in production
Risk: LOW (easy rollback, non-invasive)
Phase: Phase 1, Task 1.1 (Quick Wins - Console.log Production Gating)

Files changed:
- NEW: lib/utils/logger.ts (production-safe logging)
- NEW: scripts/replace-console-logs.js (automation tool)
- Modified: 15 lib/*.ts files (console.log → logger.log)
- Modified: .env (DEBUG_LOGS=false)

Next: Task 1.2 (Image Size Optimization)

lib/drift/client.ts

@@ -5,6 +5,7 @@
  */
 
 import { Connection, PublicKey, Keypair } from '@solana/web3.js'
+import { logger } from '../utils/logger'
 import { DriftClient, initialize, User, PerpMarkets } from '@drift-labs/sdk'
 import bs58 from 'bs58'
 import { getDriftHealthMonitor } from '../monitoring/drift-health-monitor'
@@ -43,9 +44,9 @@ export class DriftService {
       : this.connection
     
     if (config.alchemyRpcUrl) {
-      console.log('🔀 Hybrid RPC mode: Helius for init, Alchemy for trades')
+      logger.log('🔀 Hybrid RPC mode: Helius for init, Alchemy for trades')
     } else {
-      console.log('📡 Single RPC mode: Helius for all operations')
+      logger.log('📡 Single RPC mode: Helius for all operations')
     }
     
     // Create wallet from private key
@@ -88,7 +89,7 @@ export class DriftService {
       }
     }
     
-    console.log('✅ Drift service created for wallet:', this.wallet.publicKey.toString())
+    logger.log('✅ Drift service created for wallet:', this.wallet.publicKey.toString())
   }
 
   /**
@@ -118,17 +119,17 @@ export class DriftService {
           error?.code === 'EAI_AGAIN' ||
           error?.cause?.code === 'EAI_AGAIN'
         
-        console.log(`🔍 Error detection: isTransient=${isTransient}, attempt=${attempt}/${maxRetries}`)
-        console.log(`🔍 Error details: message="${error?.message}", code="${error?.code}", cause.code="${error?.cause?.code}"`)
+        logger.log(`🔍 Error detection: isTransient=${isTransient}, attempt=${attempt}/${maxRetries}`)
+        logger.log(`🔍 Error details: message="${error?.message}", code="${error?.code}", cause.code="${error?.cause?.code}"`)
         
         if (!isTransient || attempt === maxRetries) {
           // Non-transient error or max retries reached - fail immediately
-          console.log(`❌ Not retrying: isTransient=${isTransient}, maxed=${attempt === maxRetries}`)
+          logger.log(`❌ Not retrying: isTransient=${isTransient}, maxed=${attempt === maxRetries}`)
           throw error
         }
         
-        console.log(`⚠️ ${operationName} failed (attempt ${attempt}/${maxRetries}): ${error?.message || error}`)
-        console.log(`⏳ Retrying in ${delayMs}ms...`)
+        logger.log(`⚠️ ${operationName} failed (attempt ${attempt}/${maxRetries}): ${error?.message || error}`)
+        logger.log(`⏳ Retrying in ${delayMs}ms...`)
         
         // Wait before retry
         await new Promise(resolve => setTimeout(resolve, delayMs))
@@ -144,12 +145,12 @@ export class DriftService {
    */
   async initialize(): Promise<void> {
     if (this.isInitialized) {
-      console.log('⚠️ Drift service already initialized')
+      logger.log('⚠️ Drift service already initialized')
       return
     }
 
     try {
-      console.log('🚀 Initializing Drift Protocol client...')
+      logger.log('🚀 Initializing Drift Protocol client...')
 
       // Wrap initialization in retry logic to handle DNS failures
       await this.retryOperation(async () => {
@@ -170,20 +171,20 @@ export class DriftService {
 
         // Subscribe to Drift account updates (this makes RPC calls)
         await this.driftClient.subscribe()
-        console.log('✅ Drift client subscribed to account updates')
+        logger.log('✅ Drift client subscribed to account updates')
 
         // Get user account
         this.user = this.driftClient.getUser()
       }, 3, 2000, 'Drift initialization')
       
       this.isInitialized = true
-      console.log('✅ Drift service initialized successfully')
+      logger.log('✅ Drift service initialized successfully')
       
       // CRITICAL FIX (Nov 25, 2025): Intercept errors BEFORE starting monitor
       // Without this, errors aren't recorded and auto-restart never triggers
-      console.log('🔧 Setting up error interception for health monitoring...')
+      logger.log('🔧 Setting up error interception for health monitoring...')
       this.interceptWebSocketErrors()
-      console.log('✅ Error interception active')
+      logger.log('✅ Error interception active')
       
       // Start health monitoring (error-based restart instead of blind timer)
       const monitor = getDriftHealthMonitor()
@@ -427,7 +428,7 @@ export class DriftService {
   async disconnect(): Promise<void> {
     if (this.driftClient) {
       await this.driftClient.unsubscribe()
-      console.log('✅ Drift client disconnected')
+      logger.log('✅ Drift client disconnected')
     }
     this.isInitialized = false
   }
@@ -460,9 +461,9 @@ export function getDriftService(): DriftService {
     }
     
     driftServiceInstance = new DriftService(config)
-    console.log('🔄 Created new Drift service singleton')
+    logger.log('🔄 Created new Drift service singleton')
   } else {
-    console.log('♻️  Reusing existing Drift service instance')
+    logger.log('♻️  Reusing existing Drift service instance')
   }
   
   return driftServiceInstance
@@ -471,7 +472,7 @@ export function getDriftService(): DriftService {
 export async function initializeDriftService(): Promise<DriftService> {
   // If already initializing, return the same promise to avoid multiple concurrent inits
   if (initializationPromise) {
-    console.log('⏳ Waiting for ongoing initialization...')
+    logger.log('⏳ Waiting for ongoing initialization...')
     return initializationPromise
   }
   
@@ -479,7 +480,7 @@ export async function initializeDriftService(): Promise<DriftService> {
   
   // If already initialized, return immediately
   if (service['isInitialized']) {
-    console.log('✅ Drift service already initialized')
+    logger.log('✅ Drift service already initialized')
     return service
   }