Update atomic session append tutorial for 0.1.0 stress demo

[lyndonbauto]

Summary

Follow-up to #26 (merged). Updates the published tutorial for adk-aerospike 0.1.0 segment storage:

• Pin adk-aerospike==0.1.0 in install instructions
• Scale complete example to 64 writers × 1000 appends (64,005 events total)
• Add Semaphore(4) in-flight cap and relaxed client max_error_rate for single-node Docker runs
• Refresh output block from a verified run (cur_segment=78, 39s on CE)

Test plan

• Ran atomic_session_append_demo.py equivalent against PyPI 0.1.0 — 64,005 events, no RecordTooBig / MaxErrorRateExceeded