research the possibility to include arb3 tx gas usage and gasPrice in the arb3 task context from solidity

[rouzwelt]

if possible, this can:

• increase efficiency substantially
• improve opportunity accuracy
• lower rpc consumption

[thedavidmeister]

🤖 ai:producer

Re-verified against master 2026-08-12: still present — no gas usage or gasPrice reaches the arb3 task context; tasks/ensure-bounty.rain still reads only context<0 0> (sender) and context<1 0>/context<1 1> (bounty amounts), signedContext is always empty at src/core/modes/router/simulate.ts:226, and the two-dryrun-per-opportunity estimation this would displace is still at src/core/modes/simulator.ts:90-215.