Description

Implement the LlmProvider trait for Ollama local inference using the ollama-rs crate.

Parent: #2

Branch

feat/m1/ollama-backend

Files

• crates/zeph-llm/src/ollama.rs — OllamaProvider struct + LlmProvider impl
• crates/zeph-llm/src/lib.rs — add module
• crates/zeph-llm/Cargo.toml — add ollama-rs, tokio deps

Acceptance Criteria

• OllamaProvider::new(base_url, model) constructor
• chat() sends messages, returns response text
• health_check() async method verifies Ollama is reachable
• Handles connection errors gracefully

Depends On

#8 (LlmProvider trait)