GET Withdrawal Estimate

-------------------------------------------
OVERVIEW
-------------------------------------------

Endpoint: GET /api/v1/withdrawal/estimate
Method: GET
Authentication: Not Required
Rate Limit: 100 requests/minute

PURPOSE:
Provides estimated withdrawal amounts including fees, gas costs, and privacy
delay verification for planned withdrawals from CipherX privacy pools.

-------------------------------------------
EXAMPLE RESPONSE
-------------------------------------------

{
  "success": true,
  "poolId": "cipherx-bsc-01",
  "denomination": "0.1",
  "currency": "BNB",
  "estimatedWithdrawal": {
    "grossAmount": "0.1",
    "platformFee": "0.001",
    "gasEstimate": "0.0006",
    "netAmount": "0.0984",
    "netAmountUSD": "66.89",
    "effectiveFeePercent": "1.6"
  },
  "privacyStatus": {
    "delayRequired": 300,
    "delayElapsed": 450,
    "canWithdraw": true,
    "privacyScore": "high"
  }
}