refactor(warmup): use warmup for OS cache only, don't reuse engine

Warmup engine is no longer reused due to MCP loading issues when
the browser context differs. Instead it pre-warms OS caches and
is cleaned up on first real request. Simplifies the warmup flow.

refactor(electron): always warmup nuwaxcode engine

electron-v0.9.5: bundle nuwaxcode binary via extraResources

fix(log): prevent archiveLogFn infinite recursion on rotation failure

When renameSync fails (e.g. ENOENT), the catch block calls log.warn()
which triggers another log write → archiveLogFn again → infinite loop,
generating 1.6GB+ in minutes. Add isArchiving re-entrancy guard to
break the cycle.

v0.9.3

Release NuwaClaw v0.9.2

chore: update pnpm-lock.yaml after moving nuwax-mcp-stdio-proxy to de…

…vDependencies