Max contracts is currently limited by heap size

[tomjohn1028]

const MAX_CONTRACTS: usize = 10;

We currently have a limit on the max contracts because of how we serialize and deserialize the entire OptionMarket with option_writer_registry included.

Based on the Solana Account data limits (~10MB as of this writing) and OptionMarket should really be able to hold > 30,000 OptionWriters in its registry. Allowing for that many open option contracts for a given market.

To get closer to this 30,000 limit for V1, we will need to avoid loading the entire registry into memory and some how shard / parse it more efficiently. Looping may prove to be an issue because of the Solana runtime compute limits.

[tomjohn1028]

@Taylor123 locally I had the tests pass at 1,000 and 10,000, but got a stack overflow at const MAX_CONTRACTS: usize = 30000;

Might have to do some more stress testing on the limitations.

[tomjohn1028]

• add integration test for removing an option writer at the end of the registry (compute limitations is the worry)
• try changing market.rs:142 to use a slice

[tomjohn1028]

This is obsolete after the refactor to remove OptionWriterRegistry