Release tracking issue: Distributions and staking.

[erwanor]

High-level milestones:

This is a WIP. I will edit the ticket as I go.

1. Layout the groundwork for a robust staking component

• staking: add a min_validator_stake threshold for validator indexing #2921
• staking: refactor and clean up staking rate calculations #1480
• staking: reverse causality of rate calculations #1481
• staking: rework epoch transition rate calculations #3398
• staking: ignore byzantine violations from unregistered validators #2919
• staking(rate): measure voting power in units of staking tokens #3661
• staking: refactor and clean up staking rate calculations #1480
• staking: update UndelegateClaimCircuit to use penumbra-num amount and fixpoint arithmetic #3456
• staking: use Amount for token quantities
• stake: refactor the staking component to use modular traits (draft) #3615
• staking: fix validator unbonding period tracking #3683

2. Distribution and funding components facilitate protocol management of rewards

• penumbra: create a funding component #3663
• funding: process staking streams at end of epoch #3682

3. Staking token issuance is dynamic and decided by the distributions component

• Creating a component that tracks all distributions #1934
• Change staking system to do fixed issuance per block #3409
• distributions: add chain parameters and genesis data #3413
• distributions: compute and distribute inflation per epoch #3415
• fees: transaction tips for block proposers #3633

4. Staking token issuance is dynamic, and based on a YoY inflation target (to be fleshed out)

• staking: track epoch durations
• staking: add chain parameters for time-based issuance
• staking: track percentage of bonded stake
• staking: implement issuance controller
• penumbra: add a synchrony check to BFT time #3668