Remove redundant .npmignore file

Add GitHub Actions workflow for npm publishing with provenance

Bump version to 1.5.1 for npm release

Add PowerShell test suite for MCP tools

Restore documentation files in docs directory

Cleanup project, update .gitignore, and sync with latest changes

Add RPC failover with 4 tested nodes and comprehensive RPC testing suite

feat: Add RPC node redundancy with backup node

feat: Add Nano (XNO) conversion utilities as MCP tool

CRITICAL FIX: Double deduction/addition bug in send and receive blocks - Root cause: nanocurrency-web calculates balance internally - Send: finalBalance = walletBalanceRaw - amountRaw - Receive: finalBalance = walletBalanceRaw + amountRaw - We were passing PRE-CALCULATED balance, causing double operations - Now passing CURRENT balance and letting library calculate - Fixed both sendTransaction and createReceiveBlock - Added 5 comprehensive tests demonstrating the bug and fix

Fix: Receive block using wrong balance (doubling bug) - Fixed createReceiveBlock to use NEW balance instead of OLD balance - walletBalanceRaw now correctly set to (current + pending) instead of just current - Added comprehensive tests to verify the fix - Bug was causing receive blocks to fail with incorrect balance values

Add comprehensive amount tracking diagnostics for send transactions

Fix critical duplicate block hash issue

Fix critical stale frontier bug in sendTransaction

Fix critical balance conversion bug - values were doubled