bug: expect() panic on tokio runtime creation in generator.rs

[aphoristicartist]

Context

engine/src/context_tree/generator.rs:117 uses expect() which panics if tokio runtime creation fails:

let rt = self.runtime.get_or_init(|| {
    tokio::runtime::Runtime::new().expect("Failed to create tokio runtime")
});

Rest of codebase uses Result-based error propagation.

Suggested Fix

Return GeneratorError instead of panicking.

Files

• engine/src/context_tree/generator.rs:117

Severity

High

Found during review of #242