refactor(emulator): eliminate DRY violation in handleWriteMultipleRegisters (#322)

Eliminates DRY (Don't Repeat Yourself) violation in the handleWriteMultipleRegisters function by consolidating duplicated loop logic.

Changes:
- Consolidate two separate loops into a single loop that always collects values
- Move conditional logging after value collection
- Maintains 100% test coverage
- No functional changes to behavior

Technical Details:
- Before: Two separate loops - one collecting values for logging, one without
- After: Single loop always collects values, conditional logging after
- Performance impact is negligible (array creation < 1μs), prioritizing code maintainability

Test Results:
- All 331 emulator unit tests pass
- 100% coverage maintained on function-codes.ts

Author: groupsky

packages/emulator/src/behaviors/function-codes.ts

@@ -170,19 +170,16 @@ function handleWriteMultipleRegisters(
   }
 
   // Write registers
+  const values: number[] = []
+  for (let i = 0; i < quantity; i++) {
+    const value = request.readUInt16BE(7 + i * 2)
+    device.setHoldingRegister(startAddress + i, value)
+    values.push(value)
+  }
+
+  // Log write operation if verbose logging enabled
   if (verboseLogger) {
-    const values: number[] = []
-    for (let i = 0; i < quantity; i++) {
-      const value = request.readUInt16BE(7 + i * 2)
-      device.setHoldingRegister(startAddress + i, value)
-      values.push(value)
-    }
     verboseLogger.logWrite(slaveId, 0x10, startAddress, quantity, values)
-  } else {
-    for (let i = 0; i < quantity; i++) {
-      const value = request.readUInt16BE(7 + i * 2)
-      device.setHoldingRegister(startAddress + i, value)
-    }
   }
 
   // Response: slave_id + function_code + start_address + quantity