perf(core): dispatch shielding and telemetry instrumentation

[protheeuz]

Pull Request

Summary

This pull request adds debug telemetry to the batching pipeline and improves the safety of packet listener execution. It introduces decodeToTable to enforce a clean API boundary when deserializing network payloads.

Technical Implementation

• Batcher: Added poolHit, poolMiss, and poolReject counters to track exact-size buffer pooling behavior. Implemented deferExactBufferRelease to release buffers after the RemoteEvent fires. Moved batch processing to inline callbacks to prevent intermediate array allocations.
• Serializer: Added decodeToTable to construct state dictionaries safely before they reach public listeners.
• Packet: Replaced the previous zero-allocation inline dispatch with decodeToTable. Wrapped all listener executions in pcall to prevent malformed payloads from halting the receive loop. Added GC tracking hooks.
• Channel: Removed inaccurate zero-allocation claims from inline comments to reflect the new allocation-aware pipeline.

Changelog Entry

• Core: Implementation of batcher telemetry and protected packet dispatch. Improves memory visibility and listener safety.

Type of Change

• Feature
• Bug Fix
• Performance Optimization
• Documentation Update
• Maintenance / Chore

Verification and Standards

• I have adhered to the Development Patterns.
• I have verified that all CI/CD linting and formatting checks pass.
• I have confirmed the changes within a Rojo-supported environment.
• I have updated the technical documentation for any API or architectural changes.

[suckserberg]

LGTM👍