OpenClaw Signals: Retry Jitter, Sandbox Lockdown, and the Scheduling Overhaul

Concurrency

PR #329: Jittered retry backoff for plugin failures

Adds a jittered exponential backoff strategy for plugin retries. Prevents thundering herd issues when multiple plugins fail simultaneously.

Sandbox

PR #328: Tighten sandbox filesystem mount restrictions

Locks down filesystem mounts in the plugin sandbox to prevent path traversal attacks. A good security hardening step for production deployments.

Scheduling

PR #327: Plugin-aware task scheduling overhaul

Refactors the internal task scheduler to support plug-in priority queues. Lets builders customize execution ordering without forking the core.

Diagnosed & Fixed

Issue #1560: OOM tracking in high-concurrency plugin runs

Continues the investigation into OutOfMemory errors under high plugin concurrency. If your clusters are hitting memory ceilings, this thread is the live root-cause analysis.