chore: Bump version to 0.1.5

- Fix orphaned tool_use error by tracking skip state per call_id
- Handle retries with same call_id correctly
- Add comprehensive debug logging for troubleshooting

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

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

llmx-rs/app-server/tests/suite/user_agent.rs

@@ -26,7 +26,7 @@ async fn get_user_agent_returns_current_llmx_user_agent() -> Result<()> {
 
     let os_info = os_info::get();
     let user_agent = format!(
-        "llmx_cli_rs/0.1.4 ({} {}; {}) {} (llmx-app-server-tests; 0.1.4)",
+        "llmx_cli_rs/0.1.5 ({} {}; {}) {} (llmx-app-server-tests; 0.1.5)",
         os_info.os_type(),
         os_info.version(),
         os_info.architecture().unwrap_or("unknown"),