Harden escrow dispute resolution

[dotmantissa]

Summary

I hardened escrow dispute resolution with a mandatory review window, tiered appeals, staked arbitrators, and on chain accountability for successful appeals.

Type of change

• Bug fix
• New feature
• Documentation update
• Refactor / chore
• Smart contract change

Related issue

Closes #557

Changes

• I added the 1,000 ledger review delay and emit the review period end with dispute events.
• I added primary, appellate, and final arbitrator tiers with minimum token stakes and protected active assignments.
• I added participant appeals with higher tier enforcement, a two appeal depth limit, and review period resets.
• I added automatic 50 percent stake slashing to the prevailing participant after a successful appeal.
• I hardened disputed escrow claim and cancellation paths and recorded the resolution ledger.

Testing

• Tested locally on Testnet
• Added/updated unit tests
• Manually tested UI flow

Screenshots (if UI change)

Not applicable.

Checklist

• My code follows the project style
• I updated docs if needed
• No new console errors or warnings
• I based this branch on the latest main

[bamiebot-maker]

weldone
seems the failing job is not from us i also have 9 failing ci

[dotmantissa]

weldone seems the failing job is not from us i also have 9 failing ci

Yeah, I've been stuck trying to fix it since. 😂
The repo is in an already failing state; my fixes are clean though, so I'll just leave it that way.