chore: update n8n to 2.2.3 and bump version to 2.31.7 (#523)

- Updated n8n from 2.1.5 to 2.2.3
- Updated n8n-core from 2.1.4 to 2.2.2
- Updated n8n-workflow from 2.1.1 to 2.2.2
- Updated @n8n/n8n-nodes-langchain from 2.1.4 to 2.2.2
- Rebuilt node database with 540 nodes (434 from n8n-nodes-base, 106 from @n8n/n8n-nodes-langchain)
- Updated README badge with new n8n version
- Updated CHANGELOG with dependency changes

Conceived by Romuald Członkowski - https://www.aiadvisors.pl/en

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

Co-authored-by: Romuald Członkowski <romualdczlonkowski@MacBook-Pro-Romuald.local>
Co-authored-by: Claude <noreply@anthropic.com>

dist/mcp/tools.js

@@ -20,6 +20,11 @@ exports.n8nDocumentationToolsFinal = [
                 },
             },
         },
+        annotations: {
+            title: 'Tools Documentation',
+            readOnlyHint: true,
+            idempotentHint: true,
+        },
     },
     {
         name: 'search_nodes',
@@ -50,6 +55,11 @@ exports.n8nDocumentationToolsFinal = [
             },
             required: ['query'],
         },
+        annotations: {
+            title: 'Search Nodes',
+            readOnlyHint: true,
+            idempotentHint: true,
+        },
     },
     {
         name: 'get_node',
@@ -103,6 +113,11 @@ exports.n8nDocumentationToolsFinal = [
             },
             required: ['nodeType'],
         },
+        annotations: {
+            title: 'Get Node Info',
+            readOnlyHint: true,
+            idempotentHint: true,
+        },
     },
     {
         name: 'validate_node',
@@ -183,6 +198,11 @@ exports.n8nDocumentationToolsFinal = [
             },
             required: ['nodeType', 'displayName', 'valid']
         },
+        annotations: {
+            title: 'Validate Node Config',
+            readOnlyHint: true,
+            idempotentHint: true,
+        },
     },
     {
         name: 'get_template',
@@ -203,6 +223,11 @@ exports.n8nDocumentationToolsFinal = [
             },
             required: ['templateId'],
         },
+        annotations: {
+            title: 'Get Template',
+            readOnlyHint: true,
+            idempotentHint: true,
+        },
     },
     {
         name: 'search_templates',
@@ -293,6 +318,11 @@ exports.n8nDocumentationToolsFinal = [
                 },
             },
         },
+        annotations: {
+            title: 'Search Templates',
+            readOnlyHint: true,
+            idempotentHint: true,
+        },
     },
     {
         name: 'validate_workflow',
@@ -378,6 +408,11 @@ exports.n8nDocumentationToolsFinal = [
             },
             required: ['valid', 'summary']
         },
+        annotations: {
+            title: 'Validate Workflow',
+            readOnlyHint: true,
+            idempotentHint: true,
+        },
     },
 ];
 //# sourceMappingURL=tools.js.map