petrol-v8 — the absolute solution

Single 22.7 MB ONNX (havengo's proven-best weights), but layered with the maximum-information preprocessing + TTA pipeline:

• CLAHE on the L-channel (rescues low-contrast / dusk frames)
• Mean-color letterbox padding (vs grey 114) — fewer edge false positives
• 4-pass TTA: 2 scales (1280, 1408) × {original, h-flip}
• WBF fusion across all 4 outputs (no agreement gate — keeps singletons)
• Class-aware confidence thresholds (pumps lower, canopy higher)
• Geometric sanity filter (drops 0px or full-image junk)

Designed under the constraint that the honest local benchmark proved filtering moves (agreement gates, conf thresholds post-WBF) HURT scores. v8 only adds techniques that contribute information.

Repo size: 22.7 MB. Expected p95 latency: ~6 s (under 10 s gate).