fix: update integration tests to use valid tools after v2.25.0 removal

Replaced all references to removed tools in integration tests:
- list_nodes -> search_nodes
- get_database_statistics -> tools_documentation
- list_ai_tools -> search_nodes/tools_documentation
- list_tasks -> tools_documentation
- get_node_as_tool_info -> removed test section

Updated test files:
- tests/integration/mcp-protocol/basic-connection.test.ts
- tests/integration/mcp-protocol/performance.test.ts
- tests/integration/mcp-protocol/session-management.test.ts
- tests/integration/mcp-protocol/test-helpers.ts
- tests/integration/mcp-protocol/tool-invocation.test.ts
- tests/integration/telemetry/mcp-telemetry.test.ts
- tests/unit/mcp/disabled-tools.test.ts
- tests/unit/mcp/tools-documentation.test.ts

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

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

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

tests/integration/telemetry/mcp-telemetry.test.ts

@@ -500,15 +500,15 @@ describe.skip('MCP Telemetry Integration', () => {
       const slowToolRequest: CallToolRequest = {
         method: 'tools/call',
         params: {
-          name: 'list_nodes',
-          arguments: { limit: 1000 }
+          name: 'search_nodes',
+          arguments: { query: 'http', limit: 1000 }
         }
       };
 
       // Mock a slow operation
       vi.spyOn(mcpServer as any, 'executeTool').mockImplementation(async () => {
         await new Promise(resolve => setTimeout(resolve, 2000)); // 2 second delay
-        return { nodes: [], totalCount: 0 };
+        return { results: [], totalCount: 0 };
       });
 
       const server = (mcpServer as any).server;
@@ -519,7 +519,7 @@ describe.skip('MCP Telemetry Integration', () => {
       }
 
       expect(telemetry.trackToolUsage).toHaveBeenCalledWith(
-        'list_nodes',
+        'search_nodes',
         true,
         expect.any(Number)
       );