Linea zkEVM rollup telemetry from the public Linea RPC: latest sequencer block, safe block and finalized block (proven and finalized on Ethereum L1) with numbers, times and transaction counts, the finality lag in blocks and seconds, gas price (gwei), base fee, gas used % of limit and average block time over the last 20 blocks. Batch/proof IDs are not exposed by the RPC and are not reported.