[Orchard] Finalize keyword and legacy API fixes

[jdowning100]

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[Copilot]

Pull Request Overview

This PR implements finalized and safe block numbers for improved Ethereum API compatibility along with RPC security enhancements and tracer system improvements. The changes support the latest Ethereum standards for block referencing while adding critical security measures for RPC operations.

Key changes:

• Added "safe" and "finalized" block number types alongside existing "latest", "pending", and "earliest"
• Implemented batch request limits and response size restrictions in RPC handlers
• Updated client methods to use Quai-specific API endpoints instead of Ethereum "eth_" prefixes
• Added comprehensive JavaScript tracer system with multiple built-in tracers

Reviewed Changes

Copilot reviewed 94 out of 97 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
rpc/types.go	Adds SafeBlockNumber and FinalizedBlockNumber constants with JSON unmarshaling support
rpc/handler.go	Implements MaxBatchCalls and MaxBatchResponseSize limits for RPC security
rpc/websocket.go	Reduces buffer sizes and message limits, decreases ping interval for better performance
quaiclient/ethclient/ethclient.go	Updates API calls from "eth_" to "quai_" prefixes and fixes transaction argument handling
quaistats/quaistats.go	Adds new blockchain metrics including conversion flow amounts and slip calculations
quai/tracers/*	Implements complete JavaScript tracer system with multiple tracer types

Comments suppressed due to low confidence (1)

quai/tracers/tracer.go:66

• [nitpick] The parameter name vm conflicts with the VM package import and could be confusing. Consider renaming to ctx or duktapeCtx for clarity.

	ctx.PushString(n.String())