## Why

RC8 qualification evidence cannot support candidate readiness because clean traffic loses packets without stage attribution, reorder-off jitter reorders traffic, and resource counters include the provider/client driver rather than the gateway process alone.

## What Changes

- Attribute every production-path packet outcome at the source fixture, native provider queue, gateway forwarding, QUIC, and public-client stages.
- Preserve source order for reorder-off profiles while retaining configured latency and jitter; inject bounded reorder only when enabled.
- Measure gateway CPU, heap, allocations, and goroutines from the gateway process only, with isolated per-profile counters.
- Measure and record bounded nonzero monotonic-clock overhead using a batched method.
- Retain the existing six-profile matrix and real provider-to-public-client traversal.

## Capabilities

### New Capabilities

None.

### Modified Capabilities

- `gateway-qualification`: Require attributable clean-path delivery, independent impairment axes, gateway-process-only resource evidence, and truthful timing-overhead evidence.

## Impact

P3C-002, P3C-026, P3C-028, P3C-029, and P3C-033; the GPL Data Plane qualification driver, production gateway subprocess boundary, raw evidence, and append-only Phase 3C-G evidence. No Protocol wire contract, provider route, transcode path, or closed Server dependency is introduced.