LOW: console.log includes full wallet addresses — privacy concern

[rz1989s]

Description

`index.ts:125,153`: `console.log(`[session] resolved ... for ${wallet}`)` logs full wallet addresses. For a privacy-focused product, this creates IP↔wallet correlation in server logs.

Fix

Truncate: `wallet.slice(0, 4) + '...' + wallet.slice(-4)`

[rz1989s]

Fixed in PR #70 (merged to main).