[QoS][Solana] Disqualify endpoints with recent non-JSONRPC response

[adshmh]

Summary

Add JSON-RPC response validation error tracking for Solana endpoints

Primary Changes:

• Created new JsonRpcResponseValidationError protobuf message to capture validation errors with error types and timestamps
• Enhanced SolanaUnrecognizedResponse to include optional validation error information
• Modified Solana endpoint validation to reject endpoints with recent validation errors (within 30-minute window)

Secondary Changes:

• Updated responseGeneric to track and include validation errors in observations
• Added error handling for non-JSON-RPC responses with appropriate error codes and timestamps
• Enhanced endpoint observation processing to update latest validation errors from unrecognized responses

Issue

Endpoints with non-JSONRPC response should be disqualified.

• Issue or PR: #{ISSUE_OR_PR_NUMBER}

Type of change

Select one or more from the following:

• New feature, functionality or library
• Bug fix
• Code health or cleanup
• Documentation
• Other (specify)

QoS Checklist

E2E Validation & Tests

• make path_up
• make test_e2e_evm_shannon

Observability

• 1. make path_up
• 2. Run the following E2E test: make test_request__shannon_relay_util_100
• 3. View results in LocalNet's PATH Relay Grafana Dashboard

Sanity Checklist

• I have updated the GitHub Issue assignees, reviewers, labels, project, iteration and milestone
• For docs, I have run make docusaurus_start
• For code, I have run make test_all
• For configurations, I have updated the documentation
• I added TODOs where applicable

[Olshansk]

LGTM. Thanks for all the TODOs!