No total deposits/withdrawals aggregate in FarmingPool

[ritaifeoluwa]

Description

The FarmingPool contract does not have a way to query the total amount of tokens transferred in/out of the contract. While individual transfers are trackable via events, there is no aggregate.

Current behavior

No transfer aggregate.

Expected behavior

Maintain running totals:

fn total_deposits(env: &Env) -> i128 {
    env.storage().instance().get(&DataKey::TotalDeposits).unwrap_or(0)
}

fn total_withdrawals(env: &Env) -> i128 {
    env.storage().instance().get(&DataKey::TotalWithdrawals).unwrap_or(0)
}

Update during stake/unstake/lock/unlock.

Why this matters

Protocol analytics need deposit/withdrawal totals for flow analysis.

Labels

enhancement, farming-pool, help wanted

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