feat: [AIE-3] Use atomic operations instead of read-modify-write

[DKZed]

Description

Removes workflows where we read, modify values in memory, and write back to the database

Changes Made

• Use atomic Aerospike operations for IO
• Changed data modelling to accommodate better idempotency and concurrency
• These changes also allow a single Aerospike to be used concurrently and by multiple instances of langgraph-aerospike without problems

Testing

Added concurrency tests