[Perf]: speed up cache staleness

[hyperpolymath]

What is slow / heavy

Issue 2: [Feature] Offline Pre-fetching & Stale-While-Revalidate Cartridge Caching
Description Relying on on-demand dynamic cartridge fetching introduces cold-start latency on initial tool invocations and creates a single point of failure if boj-server-cartridges becomes unreachable or rate-limited at runtime.

Measurement

Proposed Solution

Local Bundling: Bundle a pre-warmed cache of the top 20 most frequently used capability cartridges directly inside the release distribution/container.
Stale-While-Revalidate Policy: Implement an asynchronous background fetch mechanism. When a cartridge is invoked, immediately execute the locally cached version while asynchronously checking for cartridge updates in the background to eliminate cold starts entirely.

Baseline vs now

No response

Environment / hardware

No response

Before submitting

• I included reproducible measurements, not just a subjective impression.
• I searched existing issues for this.