[Feature] Lifecycle support for storing data into S3

Summary

Add lifecycle support for storing data into S3, enabling tiered/archival storage of BanyanDB data.

Task Requirements

1. Research — survey potential solutions (S3 storage backends, lifecycle policies, integration approaches with BanyanDB's existing storage model).
2. PoC — implement a proof-of-concept for the chosen approach.
3. Benchmark — run benchmarks (write/read latency, throughput, cost) before finalizing the design.

Acceptance Criteria

• Research document comparing candidate solutions.
• Working PoC.
• Benchmark results.
• Final design proposal based on PoC + bench findings.