feat: add APRO oracle as PIVOT for BStocks markets on BNB Chain

[GitGuru7]

Add APRO oracle as PIVOT for BStocks markets on BNB Chain

Adds a VIP that gives the four BStocks markets (SKHYB, NVDAB, SPCXB, TSLAB) a second, independent price source. Today they price from a single source — Atlas as MAIN, no PIVOT, no FALLBACK.

The VIP:

1. Accepts ownership of the newly deployed APRO oracle (Normal Timelock is pendingOwner)
2. Grants the Normal Timelock setTokenConfig + setDirectPrice on it via the ACM
3. Configures the four APRO feeds (3800s max stale period, matching Atlas)
4. Inserts APRO as PIVOT in the ResilientOracle — [Atlas, APRO, 0] / [true, true, false]; Atlas unchanged as MAIN
5. Sets the BoundValidator band to ±1% (1.01 / 0.99)

With a PIVOT and no FALLBACK, the Atlas price must fall inside the band around the APRO price or pricing reverts.

⚠️ Pre-execution requirement: the APRO feeds are access-controlled aggregators — APRO must whitelist 0x04480f1Ba2252CDF89deB022B58d0a03d1B4cF91 on all four access controllers before execution, or getPrice() reverts for these markets.

Simulation (simulations/vip-999/bscmainnet.ts, block 112419380) covers pre-VIP state, execution events, post-VIP config, and a behavioral proof: pricing reverts while un-whitelisted, then resolves to the pre-VIP price once whitelisted.

npx hardhat test simulations/vip-999/bscmainnet.ts --fork bscmainnet