Function operator_expected_bundles_in_epoch

pub fn operator_expected_bundles_in_epoch(
    slots_in_epoch: u64,
    operator_stake: StakeWeight,
    total_domain_stake: StakeWeight,
    bundle_slot_probability: (u64, u64),
    ln_one_over_tau: FixedU128,
    e_base: u64,
) -> Option<OperatorEpochExpectations>

Compute epoch-end expectations for an operator using the exact VRF threshold. Returns None if the operator is not throughput-relevant this epoch.

Flow is:

• calculate_threshold(…) -> u128 threshold
• p_from_threshold(threshold) -> FixedU128 per-slot probability
• compute_e_relevance(ln_one_over_tau, e_base) -> u64 E_relevance
• is_throughput_relevant_fp(S, p, E_relevance) -> bool
• chernoff_threshold_fp(S, p, ln_one_over_tau) -> u64 r

Inputs:

• slots_in_epoch: S
• operator_stake, total_domain_stake: epoch-start stake snapshot
• bundle_slot_probability: (theta_num, theta_den)
• ln_one_over_tau: ln(1/τ) in FixedU128 (e.g., LN_1_OVER_TAU_1_PERCENT)
• e_base: soft relevance floor (e.g., E_BASE)