Refactor: fix docs, clean up code quality

[prestwich]

📝 Summary

Based on #842. Draft until #842 is merged

Improves and corrects documentation in the live_builder, particularly around Order propagation through the OrderPool. Functionality does not change. Most significant API change is around BlobTypeOrderFilter, by moving constructors from free functions to assoc functions

• Improve and correct OrderPool documentation
• Add Copy impl for ReplacementData<KeyType>
• Add missing Copy impl for NonceKey
• make implementation of BlobTypeOrderFilter construction idiomatic for Rust
• add missing trace! event to BlobTypeOrderFilter when filtering an order
• add rule_name to BlobTypeOrderFilter to ensure behavior is clear in tracing event
• add From impls for ReplaceableOrderEvent, and remove some relevant .clone invocations
• update AutoRemovingOrderPoolSubscriptionId to use Weak to prevent them from holding OrderPool memory alloc for dying subscriptions
• use FuturesUnordered instead of Vec<JoinHandle<()>> in the order pool to ensure parallelization of handle reaping

✅ I have completed the following steps:

• Run make lint
• Run make test
• Added tests (if applicable)