fix: resolve tool count discrepancy in Docker environments (#6)

- Implement dynamic n8n API configuration checking
- Remove static config export in favor of lazy getter function
- Fix management tools not being registered when env vars set after startup
- Optimize logger performance with cached environment variables
- Clean up debug logging and remove console.error usage
- Bump version to 2.7.1

This ensures all 38 tools (22 documentation + 16 management) are properly
registered regardless of when environment variables become available.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

src/config/n8n-api.ts

@@ -2,9 +2,6 @@ import { z } from 'zod';
 import dotenv from 'dotenv';
 import { logger } from '../utils/logger';
 
-// Load environment variables
-dotenv.config();
-
 // n8n API configuration schema
 const n8nApiConfigSchema = z.object({
   N8N_API_URL: z.string().url().optional(),
@@ -13,12 +10,20 @@ const n8nApiConfigSchema = z.object({
   N8N_API_MAX_RETRIES: z.coerce.number().positive().default(3),
 });
 
+// Track if we've loaded env vars
+let envLoaded = false;
+
 // Parse and validate n8n API configuration
-export function loadN8nApiConfig() {
+export function getN8nApiConfig() {
+  // Load environment variables on first access
+  if (!envLoaded) {
+    dotenv.config();
+    envLoaded = true;
+  }
+  
   const result = n8nApiConfigSchema.safeParse(process.env);
   
   if (!result.success) {
-    logger.warn('n8n API configuration validation failed:', result.error.format());
     return null;
   }
   
@@ -26,16 +31,9 @@ export function loadN8nApiConfig() {
   
   // Check if both URL and API key are provided
   if (!config.N8N_API_URL || !config.N8N_API_KEY) {
-    logger.info('n8n API not configured. Management tools will be disabled.');
     return null;
   }
   
-  logger.info('n8n API configured successfully', {
-    url: config.N8N_API_URL,
-    timeout: config.N8N_API_TIMEOUT,
-    maxRetries: config.N8N_API_MAX_RETRIES,
-  });
-  
   return {
     baseUrl: config.N8N_API_URL,
     apiKey: config.N8N_API_KEY,
@@ -44,13 +42,11 @@ export function loadN8nApiConfig() {
   };
 }
 
-// Export the configuration (null if not configured)
-export const n8nApiConfig = loadN8nApiConfig();
-
-// Helper to check if n8n API is configured
+// Helper to check if n8n API is configured (lazy check)
 export function isN8nApiConfigured(): boolean {
-  return n8nApiConfig !== null;
+  const config = getN8nApiConfig();
+  return config !== null;
 }
 
 // Type export
-export type N8nApiConfig = NonNullable<ReturnType<typeof loadN8nApiConfig>>;
+export type N8nApiConfig = NonNullable<ReturnType<typeof getN8nApiConfig>>;