Solana's Alpenglow runs through validator tests as mainnet awaits activation

• —Alpenglow is listed as pending mainnet activation, with testing on testnet and devnet
• —Anza rejected the claimed September 28 launch date, which was a feature-gate queue resumption
• —The 150 ms target refers to consensus-layer finality, not end-to-end transaction time
• —The upgrade initially deploys Votor, while Rotor and Turbine replacement are deferred