docs: Fix provider count in CLAUDE.md (18+ -> 10 actual)

Updated project overview to reflect the actual number of implemented
LLM providers: Claude, DeepSeek, Gemini, Mistral, OpenRouter, Qwen,
ZAI, Zen, Cerebras, and Ollama.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: milos85vasic

CLAUDE.md

@@ -4,7 +4,7 @@ This file provides guidance to Claude Code (claude.ai/code) when working with co
 
 ## Project Overview
 
-HelixAgent is an AI-powered ensemble LLM service written in Go that combines responses from multiple language models using intelligent aggregation strategies. It provides OpenAI-compatible APIs and supports 18+ LLM providers with **dynamic provider selection** based on LLMsVerifier verification scores.
+HelixAgent is an AI-powered ensemble LLM service written in Go that combines responses from multiple language models using intelligent aggregation strategies. It provides OpenAI-compatible APIs and supports 10 LLM providers (Claude, DeepSeek, Gemini, Mistral, OpenRouter, Qwen, ZAI, Zen, Cerebras, Ollama) with **dynamic provider selection** based on LLMsVerifier verification scores.
 
 **Module**: `dev.helix.agent` (Go 1.24+, toolchain go1.24.11)