Increase MaxFrameLen to 16 MB

EigenDA current limit for Holesky (their documentation is currently outdated but the limit seems to be set to 16 MB based on the updated tests from [this PR](Layr-Labs/eigenda-proxy#100)).

op-node/rollup/derive/frame.go

@@ -8,10 +8,11 @@ import (
 	"io"
 )
 
-// Frames cannot be larger than 1 MB.
+// For EthDA, frames cannot be larger than 1 MB.
 // Data transactions that carry frames are generally not larger than 128 KB due to L1 network conditions,
 // but we leave space to grow larger anyway (gas limit allows for more data).
-const MaxFrameLen = 1_000_000
+// For AltDA, frames size can be larger. Setting to 16 MB as current blob limit for EigenDA.
+const MaxFrameLen = 16_000_000
 
 // Data Format
 //