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/pyth/price-monitor.ts

@@ -5,6 +5,7 @@
  */
 
 import { Connection, PublicKey } from '@solana/web3.js'
+import { logger } from '../utils/logger'
 import { PriceServiceConnection } from '@pythnetwork/price-service-client'
 import { getMarketConfig } from '../../config/trading'
 
@@ -47,7 +48,7 @@ export class PythPriceMonitor {
       },
     })
     
-    console.log('✅ Pyth price monitor created')
+    logger.log('✅ Pyth price monitor created')
   }
 
   /**
@@ -59,7 +60,7 @@ export class PythPriceMonitor {
       return
     }
 
-    console.log('🚀 Starting Pyth price monitor for:', config.symbols)
+    logger.log('🚀 Starting Pyth price monitor for:', config.symbols)
 
     try {
       // Get Pyth price feed IDs for all symbols
@@ -68,7 +69,7 @@ export class PythPriceMonitor {
         return marketConfig.pythPriceFeedId
       })
 
-      console.log('📡 Subscribing to Pyth WebSocket...')
+      logger.log('📡 Subscribing to Pyth WebSocket...')
 
       // Subscribe to Pyth WebSocket for real-time updates
       this.priceService.subscribePriceFeedUpdates(priceIds, (priceFeed) => {
@@ -112,13 +113,13 @@ export class PythPriceMonitor {
         }
       })
 
-      console.log('✅ Pyth WebSocket subscribed')
+      logger.log('✅ Pyth WebSocket subscribed')
 
       // Start polling fallback (every 2 seconds) in case WebSocket fails
       this.startPollingFallback(config)
 
       this.isMonitoring = true
-      console.log('✅ Price monitoring active')
+      logger.log('✅ Price monitoring active')
 
     } catch (error) {
       console.error('❌ Failed to start price monitor:', error)
@@ -130,7 +131,7 @@ export class PythPriceMonitor {
    * Polling fallback - checks prices every 2 seconds via RPC
    */
   private startPollingFallback(config: PriceMonitorConfig): void {
-    console.log('🔄 Starting polling fallback (every 2s)...')
+    logger.log('🔄 Starting polling fallback (every 2s)...')
 
     for (const symbol of config.symbols) {
       const interval = setInterval(async () => {
@@ -140,7 +141,7 @@ export class PythPriceMonitor {
           const timeSinceUpdate = Date.now() - lastUpdate
 
           if (timeSinceUpdate > 5000) {
-            console.log(`⚠️ WebSocket stale for ${symbol}, using polling fallback`)
+            logger.log(`⚠️ WebSocket stale for ${symbol}, using polling fallback`)
             await this.fetchPriceViaRPC(symbol, config.onPriceUpdate)
           }
         } catch (error) {
@@ -154,7 +155,7 @@ export class PythPriceMonitor {
       this.pollingIntervals.set(symbol, interval)
     }
 
-    console.log('✅ Polling fallback active')
+    logger.log('✅ Polling fallback active')
   }
 
   /**
@@ -223,7 +224,7 @@ export class PythPriceMonitor {
       return
     }
 
-    console.log('🛑 Stopping price monitor...')
+    logger.log('🛑 Stopping price monitor...')
 
     // Clear polling intervals
     this.pollingIntervals.forEach(interval => clearInterval(interval))
@@ -237,7 +238,7 @@ export class PythPriceMonitor {
     this.lastUpdateTime.clear()
     this.isMonitoring = false
 
-    console.log('✅ Price monitor stopped')
+    logger.log('✅ Price monitor stopped')
   }
 }